From 8f3b5296d6b5f5e7b58dbc6a11e22ede66c00b48 Mon Sep 17 00:00:00 2001
From: Krishan <Krishan-Software-developer@outlook.com>
Date: Sat, 21 Aug 2021 12:56:30 +0100
Subject: [PATCH] Js core week 1 done

finished
---
 exercises/B-hello-world/exercise.js           |  4 ++
 exercises/C-variables/exercise.js             |  4 ++
 exercises/D-strings/exercise.js               |  4 ++
 exercises/E-strings-concatenation/exercise.js |  5 +-
 exercises/F-strings-methods/exercise.js       |  9 +++
 exercises/F-strings-methods/exercise2.js      |  5 ++
 exercises/G-numbers/exercise.js               |  4 ++
 exercises/I-floats/exercise.js                |  7 +++
 exercises/J-functions/exercise.js             |  6 ++
 exercises/J-functions/exercise2.js            |  2 +-
 exercises/K-functions-parameters/exercise.js  |  5 +-
 exercises/K-functions-parameters/exercise2.js |  6 +-
 exercises/K-functions-parameters/exercise3.js |  4 ++
 exercises/K-functions-parameters/exercise4.js |  6 +-
 exercises/K-functions-parameters/exercise5.js |  6 +-
 exercises/L-functions-nested/exercise.js      | 22 +++++++
 extra/1-currency-conversion.js                | 11 +++-
 extra/2-piping.js                             | 24 +++++---
 extra/3-magic-8-ball.js                       | 58 ++++++++++++++++++-
 mandatory/1-syntax-errors.js                  | 10 ++--
 mandatory/2-logic-error.js                    |  7 +--
 mandatory/3-function-output.js                |  5 ++
 mandatory/4-tax.js                            | 15 ++++-
 23 files changed, 201 insertions(+), 28 deletions(-)

diff --git a/exercises/B-hello-world/exercise.js b/exercises/B-hello-world/exercise.js
index b179ee953..a025ce3e9 100644
--- a/exercises/B-hello-world/exercise.js
+++ b/exercises/B-hello-world/exercise.js
@@ -1 +1,5 @@
+console.log(`cd B-hello-world`)
 console.log("Hello world");
+console.log("I started to learn javascript!");
+console.log("Good Afternoon");
+console.log("I am thrilled!");
\ No newline at end of file
diff --git a/exercises/C-variables/exercise.js b/exercises/C-variables/exercise.js
index a6bbb9786..dcb5c9e01 100644
--- a/exercises/C-variables/exercise.js
+++ b/exercises/C-variables/exercise.js
@@ -1,3 +1,7 @@
 // Start by creating a variable `greeting`
 
 console.log(greeting);
+var greeting = "Hello world";
+console.log(greeting);
+console.log(greeting);
+console.log(greeting);
\ No newline at end of file
diff --git a/exercises/D-strings/exercise.js b/exercises/D-strings/exercise.js
index 2cffa6a81..f5c56c013 100644
--- a/exercises/D-strings/exercise.js
+++ b/exercises/D-strings/exercise.js
@@ -1,3 +1,7 @@
 // Start by creating a variable `message`
 
 console.log(message);
+var message = "Hello everyone, welcome to the show!";
+var typeOfMessage = typeof message;
+console.log(message);
+console.log(typeOfMessage);
\ No newline at end of file
diff --git a/exercises/E-strings-concatenation/exercise.js b/exercises/E-strings-concatenation/exercise.js
index 2cffa6a81..1e12f08f9 100644
--- a/exercises/E-strings-concatenation/exercise.js
+++ b/exercises/E-strings-concatenation/exercise.js
@@ -1,3 +1,6 @@
 // Start by creating a variable `message`
-
+var greeting = "Good Morning ,";
+var yourName = "my name is ";
+var name = "Krrish"
+var message = greeting + yourName;
 console.log(message);
diff --git a/exercises/F-strings-methods/exercise.js b/exercises/F-strings-methods/exercise.js
index 2cffa6a81..d47d9e467 100644
--- a/exercises/F-strings-methods/exercise.js
+++ b/exercises/F-strings-methods/exercise.js
@@ -1,3 +1,12 @@
 // Start by creating a variable `message`
 
 console.log(message);
+var message = "Hello my name is !!";
+var myName = "Krishan Kumar";
+console.log(message + myName.length);
+//My name is Daniel and my name is 6 characters long
+
+console.log(message);
+console.log(
+  "My name is " + myName + " and it's " + myName.length + " character long"
+);
diff --git a/exercises/F-strings-methods/exercise2.js b/exercises/F-strings-methods/exercise2.js
index b4b46943d..7f10983ea 100644
--- a/exercises/F-strings-methods/exercise2.js
+++ b/exercises/F-strings-methods/exercise2.js
@@ -1,3 +1,8 @@
 const name = " Daniel  ";
+console.log(message);
+const message =
+  "My name is " + name + " and my name is " + name.length + " characters long";
+console.log(message.trim());
+
 
 console.log(message);
diff --git a/exercises/G-numbers/exercise.js b/exercises/G-numbers/exercise.js
index 49e7bc00b..603ac13f8 100644
--- a/exercises/G-numbers/exercise.js
+++ b/exercises/G-numbers/exercise.js
@@ -1 +1,5 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+var numberOfMentors = 15;
+var numberOfStudents = 35;
+var totalNumber = numberOfMentors + numberOfStudents;
+console.log("Total number of students and mentors is : " + totalNumber);
\ No newline at end of file
diff --git a/exercises/I-floats/exercise.js b/exercises/I-floats/exercise.js
index a5bbcd852..cea90b978 100644
--- a/exercises/I-floats/exercise.js
+++ b/exercises/I-floats/exercise.js
@@ -1,2 +1,9 @@
 var numberOfStudents = 15;
 var numberOfMentors = 8;
+var NumOfTotalPeople = 23;
+
+var percentNum = numberOfStudents*100/NumOfTotalPeople;
+
+console.log("Percentage of mentors " + Math.round(percentNum) + "%");
+var percentNum = numberOfMentors*100/NumOfTotalPeople;
+console.log("Percentage of students " +  Math.round(percentNum) + "%");
\ No newline at end of file
diff --git a/exercises/J-functions/exercise.js b/exercises/J-functions/exercise.js
index 0ae5850e5..67161ffbf 100644
--- a/exercises/J-functions/exercise.js
+++ b/exercises/J-functions/exercise.js
@@ -1,7 +1,13 @@
 function halve(number) {
   // complete the function here
+  return number / 2;
 }
 
 var result = halve(12);
+console.log(result);
+
+var result = halve(5);
+console.log(result);
 
+var result = halve(19);
 console.log(result);
diff --git a/exercises/J-functions/exercise2.js b/exercises/J-functions/exercise2.js
index 82ef5e780..03360480f 100644
--- a/exercises/J-functions/exercise2.js
+++ b/exercises/J-functions/exercise2.js
@@ -1,7 +1,7 @@
 function triple(number) {
   // complete function here
+  return number * 3;
 }
 
 var result = triple(12);
-
 console.log(result);
diff --git a/exercises/K-functions-parameters/exercise.js b/exercises/K-functions-parameters/exercise.js
index 8d5db5e69..2f9faa0e3 100644
--- a/exercises/K-functions-parameters/exercise.js
+++ b/exercises/K-functions-parameters/exercise.js
@@ -1,9 +1,10 @@
 // Complete the function so that it takes input parameters
 function multiply() {
+  function multiply(a, b) {
   // Calculate the result of the function and return it
+  return a * b;
+ }
 }
-
 // Assign the result of calling the function the variable `result`
 var result = multiply(3, 4);
-
 console.log(result);
diff --git a/exercises/K-functions-parameters/exercise2.js b/exercises/K-functions-parameters/exercise2.js
index db7a8904b..f641b00e0 100644
--- a/exercises/K-functions-parameters/exercise2.js
+++ b/exercises/K-functions-parameters/exercise2.js
@@ -1,5 +1,9 @@
 // Declare your function first
 
-var result = divide(3, 4);
+function divide(num1, num2) {
+    return num1 / num2;
+  }
+
+  var result = divide(3, 4);
 
 console.log(result);
diff --git a/exercises/K-functions-parameters/exercise3.js b/exercises/K-functions-parameters/exercise3.js
index 537e9f4ec..7705a6158 100644
--- a/exercises/K-functions-parameters/exercise3.js
+++ b/exercises/K-functions-parameters/exercise3.js
@@ -1,5 +1,9 @@
 // Write your function here
 
+function createGreeting(name) {
+    return "Hello my name is " + name;
+  }
+
 var greeting = createGreeting("Daniel");
 
 console.log(greeting);
diff --git a/exercises/K-functions-parameters/exercise4.js b/exercises/K-functions-parameters/exercise4.js
index 7ab44589e..e359b702f 100644
--- a/exercises/K-functions-parameters/exercise4.js
+++ b/exercises/K-functions-parameters/exercise4.js
@@ -1,5 +1,9 @@
 // Declare your function first
+function bigSum(num1, num2) {
+    return num1 + num2;
+  }
 
-// Call the function and assign to a variable `sum`
+  // Call the function and assign to a variable `sum`
 
+var sum = bigSum(13, 124);
 console.log(sum);
diff --git a/exercises/K-functions-parameters/exercise5.js b/exercises/K-functions-parameters/exercise5.js
index 7c5bcd605..5cf453b50 100644
--- a/exercises/K-functions-parameters/exercise5.js
+++ b/exercises/K-functions-parameters/exercise5.js
@@ -1,5 +1,9 @@
 // Declare your function here
 
-const greeting = createLongGreeting("Daniel", 30);
+function createLongGreeting(name, num1) {
+    return "Hello, my name is " + name + " and I'm " + num1 + " years old";
+  }
+
+  const greeting = createLongGreeting("Daniel", 30);
 
 console.log(greeting);
diff --git a/exercises/L-functions-nested/exercise.js b/exercises/L-functions-nested/exercise.js
index a5d377442..8f39cfb86 100644
--- a/exercises/L-functions-nested/exercise.js
+++ b/exercises/L-functions-nested/exercise.js
@@ -3,3 +3,25 @@ var mentor2 = "Irina";
 var mentor3 = "Mimi";
 var mentor4 = "Rob";
 var mentor5 = "Yohannes";
+
+//function to spelling name in uppercase
+
+function greeting(message) {
+  return message.toUpperCase();
+}
+var greet_message = greeting("hello");
+
+function getMentorName(name) {
+  return name.toUpperCase();
+}
+
+var mentor1 = getMentorName("Daniel");
+console.log(greet_message + " " + mentor1);
+var mentor2 = getMentorName("Irina");
+console.log(greet_message + " " + mentor2);
+var mentor3 = getMentorName("Mimi");
+console.log(greet_message + " " + mentor3);
+var mentor4 = getMentorName("Rob");
+console.log(greet_message + " " + mentor4);
+var mentor5 = getMentorName("Yohannes");
+console.log(greet_message + " " + mentor5);
\ No newline at end of file
diff --git a/extra/1-currency-conversion.js b/extra/1-currency-conversion.js
index d82e59480..f4ca88e1f 100644
--- a/extra/1-currency-conversion.js
+++ b/extra/1-currency-conversion.js
@@ -6,6 +6,10 @@
 */
 
 function convertToUSD() {}
+function convertToUSD(amount) {
+  let poundToDollar = 1.4 * amount;
+  return poundToDollar;
+}
 
 /*
   CURRENCY CONVERSION
@@ -16,11 +20,16 @@ function convertToUSD() {}
 */
 
 function convertToBRL() {}
+function convertToBRL(amount) {
+  let transferFee = amount * 0.99;
+  let poundToReal = (transferFee * 5.7).toFixed(2);
+  return parseFloat(poundToReal);
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.
 
-To run these tests type `npm run extraTo run the tests for just this one file, type `npm run extra-tests -- --testPathPattern 1-syntax-errors` into your terminal
+To run these tests type `npm run extraTo run the tests for just this one file, type `npm run extra-tests -- --testPathPattern 1-currency-conversion` into your terminal
 (Reminder: You must have run `npm install` one time before this will work!)
 */
 
diff --git a/extra/2-piping.js b/extra/2-piping.js
index 9c8ebc76a..67191da73 100644
--- a/extra/2-piping.js
+++ b/extra/2-piping.js
@@ -16,27 +16,33 @@
   the final result to the variable goodCode
 */
 
-function add() {
-
+function add(num1, num2) {
+  let sumOfNum = num1 + num2;
+  return sumOfNum;
 }
 
-function multiply() {
-
+function multiply(num1, num2) {
+  let multiplyNum = num1 * num2;
+  return multiplyNum;
 }
 
-function format() {
-
+function format(num) {
+  let numToStr = "£" + num.toString();
+  return numToStr;
 }
 
 const startingValue = 2;
 
 // Why can this code be seen as bad practice? Comment your answer.
-let badCode =
 
-/* BETTER PRACTICE */
+let badCode = `${format(multiply(add(startingValue, 10), 2))}`;
 
-let goodCode =
+/* BETTER PRACTICE */
 
+//let goodCode =
+var addNum = add(startingValue, 10); //adding 10 to the starting value
+let multiplyNum = multiply(addNum, 2); //multiplying  the result of addNum by 2
+let goodCode = format(multiplyNum); //formatting the multiplied num into a string
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.
 
diff --git a/extra/3-magic-8-ball.js b/extra/3-magic-8-ball.js
index f3adbefa5..0d68a72ee 100644
--- a/extra/3-magic-8-ball.js
+++ b/extra/3-magic-8-ball.js
@@ -42,11 +42,44 @@
     Outlook not so good.
     Very doubtful.
 */
+const ansArray = [
+  //Very positive
+  "It is certain.",
+  "It is decidedly so.",
+  "Without a doubt.",
+  "Yes - definitely.",
+  "You may rely on it.",
+  //Positive
+  "As I see it, yes.",
+  "Most likely.",
+  "Outlook good.",
+  "Yes.",
+  "Signs point to yes.",
+  //Negative
+  "Reply hazy, try again.",
+  "Ask again later.",
+  "Better not tell you now.",
+  "Cannot predict now.",
+  "Concentrate and ask again.",
+  //Very negative
+  "Don't count on it.",
+  "My reply is no.",
+  "My sources say no.",
+  "Outlook not so good.",
+  "Very doubtful.",
+];
+function generateRandom() {
+  return Math.floor(Math.random() * ansArray.length);
+}
 
 // This should log "The ball has shaken!"
 // and return the answer.
 function shakeBall() {
+  const randomAnswer = ansArray[generateRandom()];
+
   //Write your code in here
+console.log("The ball has shaken!");
+return randomAnswer;
 }
 
 /* 
@@ -58,10 +91,30 @@ function shakeBall() {
 
   This function should expect to be called with any value which was returned by the shakeBall function.
 */
+
 function checkAnswer(answer) {
   //Write your code in here
+  let answerTurns;
+  for (let i = 0; i < ansArray.length; i++) {
+    if (answer === ansArray[i]) {
+      answerTurns = i;
+    }
+  }
+  if (answerTurns < 5) {
+    return "very positive";
+  } else if (answerTurns >= 5 && answerTurns < 10) {
+    return "positive";
+  } else if (answerTurns >= 10 && answerTurns < 15) {
+    return "negative";
+  } else {
+    return "very negative";
+  }
 }
 
+let a = shakeBall();
+console.log(checkAnswer(a));
+
+
 /* 
 ==================================
 ======= TESTS - DO NOT MODIFY =====
@@ -101,7 +154,10 @@ test("magic 8 ball returns different values each time", () => {
     );
   }
 
-  let seenPositivities = new Set(Array.from(seenAnswers.values()).map(checkAnswer));
+  let seenPositivities = new Set(
+    Array.from(seenAnswers.values()).map(checkAnswer)
+  );
+  
   if (seenPositivities.size < 2) {
     throw Error(
       "Expected to random answers with different positivities each time shakeBall was called, but always got the same one"
diff --git a/mandatory/1-syntax-errors.js b/mandatory/1-syntax-errors.js
index a10cc9ac2..8221edb36 100644
--- a/mandatory/1-syntax-errors.js
+++ b/mandatory/1-syntax-errors.js
@@ -1,14 +1,16 @@
 // There are syntax errors in this code - can you fix it to pass the tests?
 
-function addNumbers(a b c) {
+function addNumbers(a, b, c) {
   return a + b + c;
 }
 
-function introduceMe(name, age)
-  return "Hello, my name is " + name "and I am " age + "years old";
+function introduceMe(name, age){
+  return "Hello, my name is " + name + " and I am " + age + " years old";
+}
+
 
 function getTotal(a, b) {
-  total = a ++ b;
+  return  "The total is " + (a + b);
 
   return "The total is total";
 }
diff --git a/mandatory/2-logic-error.js b/mandatory/2-logic-error.js
index 9cca7603b..37c4ebc15 100644
--- a/mandatory/2-logic-error.js
+++ b/mandatory/2-logic-error.js
@@ -1,16 +1,15 @@
 // The syntax for this function is valid but it has an error, find it and fix it.
 
 function trimWord(word) {
-  return wordtrim();
+  return word.trim();
 }
 
 function getStringLength(word) {
-  return "word".length();
+  return word.length;
 }
 
 function multiply(a, b, c) {
-  a * b * c;
-  return;
+  return a * b * c;
 }
 
 /* 
diff --git a/mandatory/3-function-output.js b/mandatory/3-function-output.js
index 5a953ba60..f60b9db42 100644
--- a/mandatory/3-function-output.js
+++ b/mandatory/3-function-output.js
@@ -2,15 +2,20 @@
 function getRandomNumber() {
   return Math.random() * 10;
 }
+//generate a random number between 0 and 10
 
 // Add comments to explain what this function does. You're meant to use Google!
+
 function combine2Words(word1, word2) {
   return word1.concat(word2);
 }
 
+//It merges two strings/arrays
+
 function concatenate(firstWord, secondWord, thirdWord) {
   // Write the body of this function to concatenate three words together.
   // Look at the test case below to understand what this function is expected to return.
+  return firstWord.concat(" " + secondWord) + " " + thirdWord;
 }
 
 /* 
diff --git a/mandatory/4-tax.js b/mandatory/4-tax.js
index ba77c7ae2..5d8c84a66 100644
--- a/mandatory/4-tax.js
+++ b/mandatory/4-tax.js
@@ -5,7 +5,10 @@
   Sales tax is 20% of the price of the product.
 */
 
-function calculateSalesTax() {}
+//function calculateSalesTax() {}
+function calculateSalesTax(price) {
+  return price + (20 * price) / 100;
+}
 
 /*
   CURRENCY FORMATTING
@@ -17,7 +20,15 @@ function calculateSalesTax() {}
   Remember that the prices must include the sales tax (hint: you already wrote a function for this!)
 */
 
-function addTaxAndFormatCurrency() {}
+//function addTaxAndFormatCurrency() {}
+function addTaxAndFormatCurrency(price) 
+{
+  price = price + (20 * price) / 100;
+
+  return "£".concat(parseFloat(price).
+  toFixed(2));
+  
+}
 
 /* 
 ===================================================