update 15th april

Author: Pulkit1822

.DS_Store

@@ -0,0 +1,32 @@
+class FormulaError(Exception):
+    pass
+
+def calculate():
+    try:
+        user_input = input("Enter a number, an operator (+ or -), and another number (separated by spaces): ")
+        inputs = user_input.split()
+
+        if len(inputs) != 3:
+            raise FormulaError("Invalid input. Input must consist of 3 elements.")
+
+        num1 = float(inputs[0])
+        operator = inputs[1]
+        num2 = float(inputs[2])
+
+        if operator not in ['+', '-']:
+            raise FormulaError("Invalid operator. Operator must be '+' or '-'.")
+
+        if operator == '+':
+            result = num1 + num2
+        else:
+            result = num1 - num2
+
+        print("Result:", result)
+
+    except ValueError:
+        raise FormulaError("Invalid input. Numbers must be valid.")
+
+    except FormulaError as e:
+        print("FormulaError:", e)
+
+calculate()

Calculator (+ and - only)/FormulaError.py

@@ -0,0 +1,12 @@
+def open_file(filename):
+    try:
+        file = open(filename, 'r')
+        contents = file.read()
+        print("File contents:")
+        print(contents)
+        file.close()
+    except FileNotFoundError:
+        print("Error: File not found.")
+
+file_name = input("Input a file name: ")
+open_file(file_name) 

FileNotFoundError.py

@@ -0,0 +1,10 @@
+def test_index(data, index):
+    try:
+        result = data[index]
+        print("Result:", result)
+    except IndexError:
+        print("Error: Index out of range.")
+
+nums = [1, 2, 3, 4, 5, 6, 7]
+index = int(input("Input the index: "))
+test_index(nums, index)

IndexError.py

@@ -0,0 +1,12 @@
+import math
+
+try:
+    number = float(input("Enter a number: "))
+    if number < 0:
+        raise ValueError("Negative numbers are not allowed.")
+    result = math.sqrt(number)
+    with open("sqrt_results.txt", "w") as file:
+        file.write(f"The square root of {number} is {result}")
+    print(f"The square root of {number} is {result}")
+except ValueError as e:
+    print(f"Error: {e}")

calculate_sqrt_and_handle_exceptions/calculate_sqrt_and_handle_exceptions.py

@@ -0,0 +1,76 @@
+## Summary
+The code snippet is a Python program that simulates a simple bank account system. It defines a class called `BankAccount` which has methods for depositing, withdrawing, and checking the balance of an account. The program also includes a function to create a new account and a main function to handle user input and perform the desired operations on the accounts.
+
+## Example Usage
+```python
+1. Create Account
+2. Deposit
+3. Withdraw
+4. Check Balance
+5. Exit
+Enter your choice: 1
+Enter account number: 123456
+Enter initial balance: 1000
+Enter account holder's name: John Doe
+Account created successfully.
+
+1. Create Account
+2. Deposit
+3. Withdraw
+4. Check Balance
+5. Exit
+Enter your choice: 2
+Enter account number: 123456
+Enter deposit amount: 500
+Deposited 500 into account 123456.
+
+1. Create Account
+2. Deposit
+3. Withdraw
+4. Check Balance
+5. Exit
+Enter your choice: 3
+Enter account number: 123456
+Enter withdrawal amount: 200
+Withdrew 200 from account 123456.
+
+1. Create Account
+2. Deposit
+3. Withdraw
+4. Check Balance
+5. Exit
+Enter your choice: 4
+Enter account number: 123456
+Account 123456 balance: 1300
+
+1. Create Account
+2. Deposit
+3. Withdraw
+4. Check Balance
+5. Exit
+Enter your choice: 5
+Exiting...
+```
+
+## Code Analysis
+### Inputs
+- `account_number`: a string representing the account number
+- `initial_balance`: a float representing the initial balance of the account
+- `account_holder`: a string representing the name of the account holder
+- `amount`: a float representing the amount to deposit or withdraw
+- `choice`: a string representing the user's choice of operation
+___
+### Flow
+1. The program starts by defining a class called `BankAccount` with methods for depositing, withdrawing, and checking the balance of an account.
+2. The `create_account` function prompts the user to enter the account number, initial balance, and account holder's name, and returns a new `BankAccount` object with the provided information.
+3. The `main` function initializes an empty list called `accounts` and enters a loop to repeatedly prompt the user for their choice of operation.
+4. If the user chooses to create an account (choice 1), the `create_account` function is called and the resulting account object is appended to the `accounts` list.
+5. If the user chooses to deposit (choice 2), the program prompts for the account number and deposit amount, and then searches for the corresponding account in the `accounts` list. If found, the `deposit` method of the account object is called with the provided amount.
+6. If the user chooses to withdraw (choice 3), the program prompts for the account number and withdrawal amount, and then searches for the corresponding account in the `accounts` list. If found, the `withdraw` method of the account object is called with the provided amount.
+7. If the user chooses to check the balance (choice 4), the program prompts for the account number and searches for the corresponding account in the `accounts` list. If found, the `check_balance` method of the account object is called.
+8. If the user chooses to exit (choice 5), the program breaks out of the loop and terminates.
+9. If the user enters an invalid choice, an error message is displayed.
+___
+### Outputs
+- Messages indicating the success or failure of account creation, deposit, withdrawal, and balance checking operations.
+___

simple_banking_system/simple_banking_system.md

@@ -0,0 +1,88 @@
+class Account:
+    def __init__(self, number, balance, holder):
+        self.number = number
+        self.balance = balance
+        self.holder = holder
+
+    def deposit(self, amount):
+        if amount > 0:
+            self.balance += amount
+            print(f"Deposited {amount} into account {self.number}.")
+        else:
+            print("Invalid deposit amount.")
+
+    def withdraw(self, amount):
+        if amount > 0:
+            if self.balance >= amount:
+                self.balance -= amount
+                print(f"Withdrew {amount} from account {self.number}.")
+            else:
+                print("Insufficient funds.")
+        else:
+            print("Invalid withdrawal amount.")
+
+    def check_balance(self):
+        print(f"Account {self.number} balance: {self.balance}")
+
+
+def create_account():
+    number = input("Enter account number: ")
+    balance = float(input("Enter initial balance: "))
+    holder = input("Enter account holder's name: ")
+    return Account(number, balance, holder)
+
+
+def main():
+    accounts = []
+    while True:
+        print("\n1. Create Account")
+        print("2. Deposit")
+        print("3. Withdraw")
+        print("4. Check Balance")
+        print("5. Exit")
+        choice = input("Enter your choice: ")
+
+        if choice == "1":
+            account = create_account()
+            accounts.append(account)
+            print("Account created successfully.")
+
+        elif choice == "2":
+            number = input("Enter account number: ")
+            amount = float(input("Enter deposit amount: "))
+            for account in accounts:
+                if account.number == number:
+                    account.deposit(amount)
+                    break
+            else:
+                print("Account not found.")
+
+        elif choice == "3":
+            number = input("Enter account number: ")
+            amount = float(input("Enter withdrawal amount: "))
+            for account in accounts:
+                if account.number == number:
+                    account.withdraw(amount)
+                    break
+            else:
+                print("Account not found.")
+
+        elif choice == "4":
+            number = input("Enter account number: ")
+            for account in accounts:
+                if account.number == number:
+                    account.check_balance()
+                    break
+            else:
+                print("Account not found.")
+
+        elif choice == "5":
+            print("Exiting...")
+            break
+
+        else:
+            print("Invalid choice.")
+
+
+if __name__ == "__main__":
+    main()

simple_banking_system/simple_banking_system.py

@@ -0,0 +1 @@
+The square root of 3.0 is 1.7320508075688772