session3_strings_lists.ipynb

{
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  "metadata": {
    "colab": {
      "provenance": [],
      "include_colab_link": true
    },
    "kernelspec": {
      "name": "python3",
      "display_name": "Python 3"
    },
    "language_info": {
      "name": "python"
    }
  },
  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "view-in-github",
        "colab_type": "text"
      },
      "source": [
        "<a href=\"https://colab.research.google.com/github/singhsourav0/DSMP-2.0/blob/main/session3_strings_lists.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "### Program - The current population of a town is 10000. The population of the town is increasing at the rate of 10% per year. You have to write a program to find out the population at the end of each of the last 10 years."
      ],
      "metadata": {
        "id": "xZ2EH7kf-4WW"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "# Code here\n",
        "curr_pop = 10000\n",
        "\n",
        "for i in range(10,0,-1):\n",
        "  print(i,curr_pop)\n",
        "  curr_pop = curr_pop/1.1\n"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "mWuYuFjV-6Mo",
        "outputId": "6c39a2ad-edfb-4e26-d991-27ec83bbc961"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "10 10000\n",
            "9 9090.90909090909\n",
            "8 8264.462809917353\n",
            "7 7513.148009015775\n",
            "6 6830.134553650703\n",
            "5 6209.213230591548\n",
            "4 5644.739300537771\n",
            "3 5131.5811823070635\n",
            "2 4665.07380209733\n",
            "1 4240.976183724845\n"
          ]
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "### Sequence sum\n",
        "\n",
        "1/1! + 2/2! + 3/3! + ..."
      ],
      "metadata": {
        "id": "jmeilrsx_Dz_"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "# Code here\n",
        "\n",
        "n = int(input('enter n'))\n",
        "\n",
        "result = 0\n",
        "fact = 1\n",
        "\n",
        "for i in range(1,n+1):\n",
        "  fact = fact * i\n",
        "  result = result + i/fact\n",
        "\n",
        "print(result)\n",
        "\n",
        "\n"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "UU38MOpA_E3_",
        "outputId": "7e799872-6165-46b9-e55e-8f82e7439537"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter n2\n",
            "2.0\n"
          ]
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "# Nested Loops"
      ],
      "metadata": {
        "id": "F_ka2Jji_G3d"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "# Examples -> unique pairs\n",
        "\n",
        "for i in range(1,5):\n",
        "  for j in range(1,5):\n",
        "    print(i,j)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "3nctuHAQ_RvA",
        "outputId": "358c4383-00b0-4a91-e5be-ede4e60c537c"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "1 1\n",
            "1 2\n",
            "1 3\n",
            "1 4\n",
            "2 1\n",
            "2 2\n",
            "2 3\n",
            "2 4\n",
            "3 1\n",
            "3 2\n",
            "3 3\n",
            "3 4\n",
            "4 1\n",
            "4 2\n",
            "4 3\n",
            "4 4\n"
          ]
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "### Pattern 1\n",
        "\n",
        "\n",
        "*** <br>\n",
        "**** <br>\n",
        "***<br>\n"
      ],
      "metadata": {
        "id": "iUnoz6z1_aaI"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "# code here\n",
        "\n",
        "rows = int(input('enter number of rows'))\n",
        "\n",
        "for i in range(1,rows+1):\n",
        "  for j in range(1,i+1):\n",
        "    print('*',end='')\n",
        "  print()\n"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "exQMnIoC_Zv2",
        "outputId": "6fbe7b5e-d46c-415c-c286-c795e770f12d"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter number of rows10\n",
            "*\n",
            "**\n",
            "***\n",
            "****\n",
            "*****\n",
            "******\n",
            "*******\n",
            "********\n",
            "*********\n",
            "**********\n"
          ]
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "### Pattern 2\n",
        "\n",
        "1<br>\n",
        "121<br>\n",
        "12321<br>\n",
        "1234321<br>"
      ],
      "metadata": {
        "id": "OxXDih5R_0uB"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "# Code here\n",
        "rows = int(input('enter number of rows'))\n",
        "\n",
        "for i in range(1,rows+1):\n",
        "  for j in range(1,i+1):\n",
        "    print(j,end='')\n",
        "  for k in range(i-1,0,-1):\n",
        "    print(k,end='')\n",
        "\n",
        "  print()\n"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "x8rGo4KM_Y-j",
        "outputId": "b5da3149-fb64-4530-9bd9-ce49f8977ec8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter number of rows4\n",
            "1\n",
            "121\n",
            "12321\n",
            "1234321\n"
          ]
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "# Loop Control Statement\n",
        "\n",
        "- Break\n",
        "- Continue\n",
        "- Pass"
      ],
      "metadata": {
        "id": "oFemwQBw_8Q1"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "for i in range(1,10):\n",
        "  if i == 5:\n",
        "    break\n",
        "  print(i)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "9NNS6bDL_82u",
        "outputId": "f3c390ff-2f75-4039-95eb-f1cc05dcf6c8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "1\n",
            "2\n",
            "3\n",
            "4\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "lower = int(input('enter lower range'))\n",
        "upper = int(input('enter upper range'))\n",
        "\n",
        "for i in range(lower,upper+1):\n",
        "  for j in range(2,i):\n",
        "    if i%j == 0:\n",
        "      break\n",
        "  else:\n",
        "    print(i)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "voBWY0VC9bxW",
        "outputId": "2371cc4a-64a8-4f81-e1d7-228d517997a7"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter lower range10\n",
            "enter upper range100\n",
            "11\n",
            "13\n",
            "17\n",
            "19\n",
            "23\n",
            "29\n",
            "31\n",
            "37\n",
            "41\n",
            "43\n",
            "47\n",
            "53\n",
            "59\n",
            "61\n",
            "67\n",
            "71\n",
            "73\n",
            "79\n",
            "83\n",
            "89\n",
            "97\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Continue\n",
        "for i in range(1,10):\n",
        "  if i == 5:\n",
        "    continue\n",
        "  print(i)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "QPwyXdT09b2K",
        "outputId": "26621acc-0a86-4ade-8339-41a039a3a4bb"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "1\n",
            "2\n",
            "3\n",
            "4\n",
            "6\n",
            "7\n",
            "8\n",
            "9\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "for i in range(1,10):\n",
        "  pass\n",
        ""
      ],
      "metadata": {
        "id": "c_kqggLg9b_i"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "markdown",
      "source": [
        "Strings are sequence of Characters\n",
        "\n",
        "In Python specifically, strings are a sequence of Unicode Characters\n",
        "\n",
        "- Creating Strings\n",
        "- Accessing Strings\n",
        "- Adding Chars to Strings\n",
        "- Editing Strings\n",
        "- Deleting Strings\n",
        "- Operations on Strings\n",
        "- String Functions"
      ],
      "metadata": {
        "id": "iz0prYf-LiFB"
      }
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Creating Stings"
      ],
      "metadata": {
        "id": "i75VO5hxL_4K"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "s = 'hello'\n",
        "s = \"hello\"\n",
        "# multiline strings\n",
        "s = '''hello'''\n",
        "s = \"\"\"hello\"\"\"\n",
        "s = str('hello')\n",
        "print(s)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "FqMi90xxLotH",
        "outputId": "a4df54d5-c62e-4f3b-c012-955e8c9c6f28"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "hello\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "\"it's raining outside\""
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "NUEqGB84C1Vs",
        "outputId": "d36c8e49-bdc0-48c4-9d86-6aa39d9bf295"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "\"it's raining outside\""
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 54
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Accessing Substrings from a String"
      ],
      "metadata": {
        "id": "24fOWaO_MCtn"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "# Positive Indexing\n",
        "s = 'hello world'\n",
        "print(s[41])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 204
        },
        "id": "es8p3f7FMGP1",
        "outputId": "bb82c5df-fd38-420d-dd57-0a362aa57c67"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "error",
          "ename": "IndexError",
          "evalue": "ignored",
          "traceback": [
            "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
            "\u001b[0;31mIndexError\u001b[0m                                Traceback (most recent call last)",
            "\u001b[0;32m<ipython-input-61-633ba99ed6e5>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0;31m# Positive Indexing\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      2\u001b[0m \u001b[0ms\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m'hello world'\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 3\u001b[0;31m \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0ms\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m41\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
            "\u001b[0;31mIndexError\u001b[0m: string index out of range"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Negative Indexing\n",
        "s = 'hello world'\n",
        "print(s[-3])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "_rdwDbNYD-lY",
        "outputId": "f45e7002-fabc-48ca-e337-8452cd545c5b"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "r\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Slicing\n",
        "s = 'hello world'\n",
        "print(s[6:0:-2])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "qWGgcTHpEcSC",
        "outputId": "f4e15e5f-7da1-4cf0-c311-f14a19b3b350"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "wol\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "print(s[::-1])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "j8LMvRsRFr1S",
        "outputId": "7fcf9810-fceb-44a4-8371-8b3e2273c86a"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "dlrow olleh\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s = 'hello world'\n",
        "print(s[-1:-6:-1])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "R06YO68eF0BU",
        "outputId": "20a4bebf-430f-4d32-a81d-29a82026b20d"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "dlrow\n"
          ]
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Editing and Deleting in Strings"
      ],
      "metadata": {
        "id": "g2VqMYWqMJSU"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "s = 'hello world'\n",
        "s[0] = 'H'\n",
        "\n",
        "# Python strings are immutable"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 187
        },
        "id": "j_jPqHHyMKGK",
        "outputId": "39bd3a6a-b332-4429-ba87-27ec22f152f9"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "error",
          "ename": "TypeError",
          "evalue": "ignored",
          "traceback": [
            "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
            "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
            "\u001b[0;32m<ipython-input-80-0c8a824e3b73>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0ms\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m'hello world'\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m \u001b[0ms\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m'H'\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
            "\u001b[0;31mTypeError\u001b[0m: 'str' object does not support item assignment"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s = 'hello world'\n",
        "del s\n",
        "print(s)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 204
        },
        "id": "rF-XM6IOG8-0",
        "outputId": "e6223f5a-37bd-419f-8737-668115675fcd"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "error",
          "ename": "NameError",
          "evalue": "ignored",
          "traceback": [
            "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
            "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
            "\u001b[0;32m<ipython-input-81-9ae37fbf1c6c>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0ms\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m'hello world'\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      2\u001b[0m \u001b[0;32mdel\u001b[0m \u001b[0ms\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 3\u001b[0;31m \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0ms\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
            "\u001b[0;31mNameError\u001b[0m: name 's' is not defined"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s = 'hello world'\n",
        "del s[-1:-5:2]\n",
        "print(s)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 204
        },
        "id": "p72F5KruHO6x",
        "outputId": "365421c7-0bbe-4821-c0a5-d35d4fa80554"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "error",
          "ename": "TypeError",
          "evalue": "ignored",
          "traceback": [
            "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
            "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
            "\u001b[0;32m<ipython-input-82-d0d823eafb6b>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0ms\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m'hello world'\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m \u001b[0;32mdel\u001b[0m \u001b[0ms\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m-\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m-\u001b[0m\u001b[0;36m5\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;36m2\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      3\u001b[0m \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0ms\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
            "\u001b[0;31mTypeError\u001b[0m: 'str' object does not support item deletion"
          ]
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Operations on Strings\n",
        "\n",
        "- Arithmetic Operations\n",
        "- Relational Operations\n",
        "- Logical Operations\n",
        "- Loops on Strings\n",
        "- Membership Operations"
      ],
      "metadata": {
        "id": "6icAp0UvMKsh"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "print('delhi' + ' ' + 'mumbai')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "37rbhwLAMSt9",
        "outputId": "9ba3f855-375a-4355-8b94-21254da02eb0"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "delhi mumbai\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "print('delhi'*5)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "cnTYYnv9HsIc",
        "outputId": "1bb37e5e-4328-4f3a-c7ad-5ae255fde2e1"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "delhidelhidelhidelhidelhi\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "print(\"*\"*50)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "OJM0LcTcHsQB",
        "outputId": "57e7a5c7-1dbb-4580-e6bf-c9e5da5f79df"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "**************************************************\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'delhi' != 'delhi'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "d5wx8XKeHsWP",
        "outputId": "477dc4a2-8676-46ba-cce2-2ed345fd2e5d"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 89
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'mumbai' > 'pune'\n",
        "# lexiographically"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "G3byoyLNHsmo",
        "outputId": "1492fd4f-4329-4290-97f5-3f5ecee7b045"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 90
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'Pune' > 'pune'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "qtZ0Zm-HHsry",
        "outputId": "c9d0bf38-795d-4888-8e09-7642b8a5e494"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 91
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'hello' and 'world'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "pRj_nS6kHs00",
        "outputId": "c3ba2345-e53c-41ee-f257-89dc96c78435"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'world'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 92
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'hello' or 'world'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "KZhBwrGtJEFY",
        "outputId": "c5b891c8-e85e-4518-d3e8-874ffb0293b4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hello'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 93
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'' and 'world'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "d8W6QmDnJELj",
        "outputId": "a453a2e0-3502-49ac-d058-c69f6e248401"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "''"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 94
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'' or 'world'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "jTsHPpGQJESA",
        "outputId": "0512e1ce-47fe-4075-9b99-dc52a6cda55b"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'world'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 95
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'hello' or 'world'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "BvwdDf4PJmnz",
        "outputId": "d72174f5-64cc-42a1-bcbc-3c8790031df8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hello'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 96
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'hello' and 'world'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "pTRQabdQJnnV",
        "outputId": "5ab1851d-1203-45f1-989e-672b8ebe0f38"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'world'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 97
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "not 'hello'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "jrf62do3J4VD",
        "outputId": "b7105118-adb0-4381-c9cd-102aa64d4c70"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 99
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "for i in 'hello':\n",
        "  print(i)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "i64jefPQKRtR",
        "outputId": "b9d5e844-fc1f-4403-862c-fdc845b39161"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "h\n",
            "e\n",
            "l\n",
            "l\n",
            "o\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "for i in 'delhi':\n",
        "  print('pune')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "REKYlAzhKRzC",
        "outputId": "30920300-82b5-4406-b4eb-107c138d3ef4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "pune\n",
            "pune\n",
            "pune\n",
            "pune\n",
            "pune\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'D' in 'delhi'"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "iaiPu9JKKR5K",
        "outputId": "db043779-a7f0-4d69-c1c0-2392891d6aa0"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 104
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [],
      "metadata": {
        "id": "ewWZeQyuKR_T"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [],
      "metadata": {
        "id": "VPXS7-GBKSF8"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [],
      "metadata": {
        "id": "jdGPiAkGKSMM"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Common Functions\n",
        "- len\n",
        "- max\n",
        "- min\n",
        "- sorted"
      ],
      "metadata": {
        "id": "dE_jTrX5MYSV"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "len('hello world')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "mIm1rHvIMcZ6",
        "outputId": "15ec3b75-9fd5-4345-b0fb-ec9a4be30281"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "11"
            ]
          },
          "metadata": {},
          "execution_count": 105
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "max('hello world')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "kVpxwx3KLUlO",
        "outputId": "7dbad591-31cf-46a9-9126-1381f17cdbed"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'w'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 106
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "min('hello world')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "bWDAwg6TLUt-",
        "outputId": "1276ee22-52a1-4fb3-af5d-3c7030e063c8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "' '"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 107
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "sorted('hello world',reverse=True)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Z2dgEqi7LU1A",
        "outputId": "4decb050-6570-4974-b9a2-0aea95e081ca"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['w', 'r', 'o', 'o', 'l', 'l', 'l', 'h', 'e', 'd', ' ']"
            ]
          },
          "metadata": {},
          "execution_count": 109
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [],
      "metadata": {
        "id": "Q26dbu9VLVQg"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Capitalize/Title/Upper/Lower/Swapcase"
      ],
      "metadata": {
        "id": "yHlmb_KxMf6f"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "s = 'hello world'\n",
        "print(s.capitalize())\n",
        "print(s)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Ycqnmb-HMgyz",
        "outputId": "0a2bacaf-1c07-47b1-86e5-d5c386d40b7d"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "Hello world\n",
            "hello world\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s.title()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "KIBQhMj6L1iK",
        "outputId": "9ac3fa30-6744-4aea-89c0-0d1b3c986375"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'Hello World'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 111
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s.upper()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "TPo-CYKWL25K",
        "outputId": "f6375733-fdf6-419f-8078-1ecb781aa9e3"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'HELLO WORLD'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 112
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'Hello Wolrd'.lower()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "8ghClhVBL4Ed",
        "outputId": "bb407478-285c-4e88-ee16-093f50a6a9b3"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hello wolrd'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 113
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'HeLlO WorLD'.swapcase()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "Ac6I82JdL4bD",
        "outputId": "1034a753-bf8f-49aa-8139-27b11e8007b3"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hElLo wORld'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 114
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Count/Find/Index"
      ],
      "metadata": {
        "id": "3iq5s2cnMhkE"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "'my name is nitish'.count('i')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "puAH2DgBMmNd",
        "outputId": "8d4fbf2d-08f3-408c-9401-b40897e5ae2f"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "3"
            ]
          },
          "metadata": {},
          "execution_count": 115
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'my name is nitish'.find('x')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "KK5lf-TyMbCR",
        "outputId": "3ef39fa4-db4a-4bca-e3a8-9cee6aefa6a9"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "-1"
            ]
          },
          "metadata": {},
          "execution_count": 117
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'my name is nitish'.index('x')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 169
        },
        "id": "rkm5UBY3McKS",
        "outputId": "cb6a621b-5f30-4dbf-d5f4-433b79a4d1c4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "error",
          "ename": "ValueError",
          "evalue": "ignored",
          "traceback": [
            "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
            "\u001b[0;31mValueError\u001b[0m                                Traceback (most recent call last)",
            "\u001b[0;32m<ipython-input-121-12e2ad5b75e9>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;34m'my name is nitish'\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mindex\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'x'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
            "\u001b[0;31mValueError\u001b[0m: substring not found"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [],
      "metadata": {
        "id": "Of4uZESOMcW4"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "markdown",
      "source": [
        "## endswith/startswith"
      ],
      "metadata": {
        "id": "MrsT5bJuMmqs"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "'my name is nitish'.endswith('sho')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "TbyYTHMxMpbZ",
        "outputId": "2f76966f-8f4c-45d0-958d-979bf5d181a8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 123
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'my name is nitish'.startswith('1my')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "gpR1WiKEM8Am",
        "outputId": "eb1e9b53-edd6-4185-96eb-ed39359b6dc0"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 125
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## format"
      ],
      "metadata": {
        "id": "0A9eNV0YMqHg"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "name = 'nitish'\n",
        "gender = 'male'\n",
        "\n",
        "'Hi my name is {1} and I am a {0}'.format(gender,name)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "p9zAoUNjMtAC",
        "outputId": "e25d4cd5-22eb-4dde-9cd8-d80dd26524b9"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'Hi my name is nitish and I am a male'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 128
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## isalnum/ isalpha/ isdigit/ isidentifier"
      ],
      "metadata": {
        "id": "vKc81z_fMvIn"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "'nitish1234%'.isalnum()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "v2vFZEfCMv6c",
        "outputId": "72821996-f172-4dad-8ae1-d5a2d877eb4b"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 131
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'nitish'.isalpha()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "_AJvibg9OT-K",
        "outputId": "65c06e50-18c9-41da-cfd0-89e8d00e7fa4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "True"
            ]
          },
          "metadata": {},
          "execution_count": 133
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'123abc'.isdigit()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "JLt0leaVOUGV",
        "outputId": "0ddcf634-5c80-4fc3-8136-2c5f5885ea93"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 135
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'first-name'.isidentifier()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "V3NeoIviOUPa",
        "outputId": "cbd92200-d8d1-40bb-82bd-4a7cabe0745d"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 139
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [],
      "metadata": {
        "id": "F2Dg78FtOUaO"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Split/Join"
      ],
      "metadata": {
        "id": "CkR9E0ywMyPE"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "'hi my name is nitish'.split()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "82_UJMr7M0VC",
        "outputId": "f9fc2cd4-f718-4a72-fa56-24384f5a1337"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['hi', 'my', 'name', 'is', 'nitish']"
            ]
          },
          "metadata": {},
          "execution_count": 143
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "\" \".join(['hi', 'my', 'name', 'is', 'nitish'])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "OmLemRVTO2Qq",
        "outputId": "9597fe72-5c6e-4216-db68-1aee43a8fe87"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hi my name is nitish'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 146
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Replace"
      ],
      "metadata": {
        "id": "30p7nlw_M4M1"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "'hi my name is nitish'.replace('nitisrgewrhgh','campusx')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "vuobYzSTM5F-",
        "outputId": "31fc9c0a-80e1-42be-de9f-d8cb2ce800a8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hi my name is nitish'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 148
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Strip"
      ],
      "metadata": {
        "id": "YqdGvSgFM5hW"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "'nitish                           '.strip()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 36
        },
        "id": "AkWgOFpPM6wq",
        "outputId": "0d50c002-3615-44af-9a7a-74f1874d796c"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'nitish'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 149
        }
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "## Example Programs"
      ],
      "metadata": {
        "id": "YvVCKvEhNhie"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "# Find the length of a given string without using the len() function\n",
        "\n",
        "s = input('enter the string')\n",
        "\n",
        "counter = 0\n",
        "\n",
        "for i in s:\n",
        "  counter += 1\n",
        "\n",
        "print('length of string is',counter)"
      ],
      "metadata": {
        "id": "KKEdMynlM-_F",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "outputId": "f7eccfbd-c7d3-4825-df4a-215b2a338aaa"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter the stringnitish\n",
            "length of string is 6\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Extract username from a given email.\n",
        "# Eg if the email is nitish24singh@gmail.com\n",
        "# then the username should be nitish24singh\n",
        "\n",
        "s = input('enter the email')\n",
        "\n",
        "pos = s.index('@')\n",
        "print(s[0:pos])\n",
        "\n"
      ],
      "metadata": {
        "id": "2Db_x3upNzFo",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "outputId": "db63c64d-3775-46c0-fbf6-a65ea0e96d5b"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter the emailsupport@campusx.in\n",
            "support\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Count the frequency of a particular character in a provided string.\n",
        "# Eg 'hello how are you' is the string, the frequency of h in this string is 2.\n",
        "\n",
        "s = input('enter the email')\n",
        "term = input('what would like to search for')\n",
        "\n",
        "counter = 0\n",
        "for i in s:\n",
        "  if i == term:\n",
        "    counter += 1\n",
        "\n",
        "print('frequency',counter)\n"
      ],
      "metadata": {
        "id": "N7agO2bGN6ZH",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "outputId": "744473ea-26a5-428e-dbd1-987a2c435967"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter the emailhi how are you\n",
            "what would like to search foro\n",
            "frequency 2\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Write a program which can remove a particular character from a string.\n",
        "s = input('enter the string')\n",
        "term = input('what would like to remove')\n",
        "\n",
        "result = ''\n",
        "\n",
        "for i in s:\n",
        "  if i != term:\n",
        "    result = result + i\n",
        "\n",
        "print(result)"
      ],
      "metadata": {
        "id": "5nnIm08wOAhP",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "outputId": "b9db5f10-ec01-4539-ad92-9c6a7d6ff89c"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter the stringnitish\n",
            "what would like to removei\n",
            "ntsh\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Write a program that can check whether a given string is palindrome or not.\n",
        "# abba\n",
        "# malayalam\n",
        "\n",
        "s = input('enter the string')\n",
        "flag = True\n",
        "for i in range(0,len(s)//2):\n",
        "  if s[i] != s[len(s) - i -1]:\n",
        "    flag = False\n",
        "    print('Not a Palindrome')\n",
        "    break\n",
        "\n",
        "if flag:\n",
        "  print('Palindrome')\n",
        "\n"
      ],
      "metadata": {
        "id": "OWLbKD8yOIL8",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "outputId": "cd490de2-7bb3-49cb-a9a6-2227bca3e815"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter the stringpython\n",
            "Not a Palindrome\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Write a program to count the number of words in a string without split()\n",
        "\n",
        "s = input('enter the string')\n",
        "L = []\n",
        "temp = ''\n",
        "for i in s:\n",
        "\n",
        "  if i != ' ':\n",
        "    temp = temp + i\n",
        "  else:\n",
        "    L.append(temp)\n",
        "    temp = ''\n",
        "\n",
        "L.append(temp)\n",
        "print(L)\n",
        "\n"
      ],
      "metadata": {
        "id": "qBHUb5taOLdC",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "outputId": "7d771c8a-9123-488b-8f63-06435638fb2e"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter the stringhi how are you\n",
            "['hi', 'how', 'are', 'you']\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Write a python program to convert a string to title case without using the title()\n",
        "s = input('enter the string')\n",
        "\n",
        "L = []\n",
        "for i in s.split():\n",
        "  L.append(i[0].upper() + i[1:].lower())\n",
        "\n",
        "print(\" \".join(L))"
      ],
      "metadata": {
        "id": "tz_DbyP-OO9z",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "outputId": "218e781e-a930-4b85-a223-5de2212e0ed0"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter the stringhi my namE iS NitiSh\n",
            "Hi My Name Is Nitish\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# Write a program that can convert an integer to string.\n",
        "\n",
        "number = int(input('enter the number'))\n",
        "\n",
        "digits = '0123456789'\n",
        "result = ''\n",
        "while number != 0:\n",
        "  result = digits[number % 10] + result\n",
        "  number = number//10\n",
        "\n",
        "print(result)\n",
        "print(type(result))"
      ],
      "metadata": {
        "id": "Gj-c2HctOibM",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "outputId": "8c1c15a6-9f20-4de1-ddba-e9801122c973"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "enter the number345\n",
            "345\n",
            "<class 'str'>\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [],
      "metadata": {
        "id": "hXeCKpMROj7e"
      },
      "execution_count": null,
      "outputs": []
    }
  ]
}