Changes made as per the coursework

Author: dcostaprakash

Sprint-2/1-key-errors/0.js

@@ -1,13 +1,20 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  It will give a syntax error on using let str > write your prediction here
 
-// call the function capitalise with a string input
+// call the function capitalise with a string input - did it with the console.log
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
-}
+//function capitalise(str) {
+//  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+//  return str;
+// }
+// console.log(capitalise("newbell"));
 
 // =============> write your explanation here
+// str is a parameter which again is getting declared in line 2 of the code
 // =============> write your new code here
+function capitalise(str) {
+str = `${str[0].toUpperCase()}${str.slice(1)}`;
+return str;
+}
+console.log(capitalise("newbell"));

Sprint-2/1-key-errors/1.js

@@ -1,20 +1,27 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> write your prediction here - It will throw a syntax error
 
 // Try playing computer with the example to work out what is going on
 
+//function convertToPercentage(decimalNumber) {
+//  const decimalNumber = 0.5;
+//  const percentage = `${decimalNumber * 100}%`;
+//
+//  return percentage;
+//}
+//
+//console.log(decimalNumber);
+
+// =============> write your explanation here - We cannot redeclare decimalNumber in the function since it is already a parameter
+
+// Finally, correct the code to fix the problem
+// =============> write your new code here
 function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(decimalNumber);
-
-// =============> write your explanation here
-
-// Finally, correct the code to fix the problem
-// =============> write your new code here
+console.log(convertToPercentage (0.5));

Sprint-2/1-key-errors/2.js

@@ -3,18 +3,20 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> write your prediction of the error here - Here the syntax error will be thrown
 
-function square(3) {
-    return num * num;
-}
+//function square(3) {
+//    return num * num;
+//}
 
-// =============> write the error message here
+// =============> write the error message here - SyntaxError: Unexpected number
 
-// =============> explain this error message here
+// =============> explain this error message here : Here we cannot put a number in the function. It should be the variable name
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
-
+function square(num) {
+    return num * num;
+}
 

Sprint-2/2-mandatory-debug/0.js

@@ -1,14 +1,18 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> write your prediction here - The return in the function is missing.
 
-function multiply(a, b) {
-  console.log(a * b);
-}
+//function multiply(a, b) {
+//console.log(a * b);
+//}
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+// console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+// =============> write your explanation here - Here we did not put the return statement since it prints the answer.
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function multiply(a, b) { 
+  return a * b; 
+} 
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

Sprint-2/2-mandatory-debug/1.js

@@ -1,13 +1,17 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> write your prediction here - there is semicolon after return which should not be there
 
-function sum(a, b) {
-  return;
-  a + b;
-}
+//function sum(a, b) {
+//  return;
+//  a + b;
+//}
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============> write your explanation here - Since there is a semi colon after return, it will throw an error which needs to be modified
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function sum(a, b) {
+  return a + b;
+}
+

Sprint-2/2-mandatory-debug/2.js

@@ -1,24 +1,33 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> Write your prediction here - There is no num parameter defined in the getLastDigit(). The parenthesis is blank
 
-const num = 103;
+//const num = 103;
 
-function getLastDigit() {
-  return num.toString().slice(-1);
-}
+//function getLastDigit() {
+//  return num.toString().slice(-1);
+//}
 
 console.log(`The last digit of 42 is ${getLastDigit(42)}`);
 console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
-// =============> write the output here
+// =============> write the output here - The output shows 3 for all
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> write your explanation here - Since the parameter num is not defined, it will always pick up the const number and hence ignore all other numbers
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+const num = 103;
+
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem

Sprint-2/3-mandatory-implement/1-bmi.js

@@ -15,5 +15,7 @@
 // It should return their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
+    const bmi = weight / (height * height) 
+    return Number(bmi.toFixed(1));
     // return the BMI of someone based off their weight and height
 }

Sprint-2/3-mandatory-implement/2-cases.js

@@ -14,3 +14,8 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+function toUpperSnakeCase(str) {
+    return str
+    .toUpperCase()
+    .replaceAll(" ","_");
+}

Sprint-2/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,45 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+//const penceString = "399p";
+
+//const penceStringWithoutTrailingP = penceString.substring(
+// 0,
+//  penceString.length - 1
+//);
+
+//const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+//const pounds = paddedPenceNumberString.substring(
+// 0,
+//  paddedPenceNumberString.length - 2
+//);
+
+//const pence = paddedPenceNumberString
+//  .substring(paddedPenceNumberString.length - 2)
+//  .padEnd(2, "0");
+
+//console.log(`£${pounds}.${pence}`);
+
+function toPounds(penceString) {
+  const penceStringWithoutTrailingP = penceString.substring(
+    0,
+    penceString.length - 1
+  );
+
+  const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+
+  const pounds = paddedPenceNumberString.substring(
+    0,
+    paddedPenceNumberString.length - 2
+  );
+
+  const pence = paddedPenceNumberString
+    .substring(paddedPenceNumberString.length - 2)
+    .padEnd(2, "0");
+
+  return `£${pounds}.${pence}`;
+}
+console.log(toPounds("399p"));   // £3.99
+console.log(toPounds("50p"));    // £0.50
+console.log(toPounds("5p"));     // £0.05
+console.log(toPounds("12345p")); // £123.45

Sprint-2/4-mandatory-interpret/time-format.js

@@ -17,18 +17,23 @@ function formatTimeDisplay(seconds) {
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> write your answer here`
+// It will be called 3 times
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
 // =============> write your answer here
+//0
 
 // c) What is the return value of pad is called for the first time?
 // =============> write your answer here
+//00
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
 // =============> write your answer here
+//When pad is called for the last time, the value assigned is 1. The remainder is 1 after dividine by 60
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
 // =============> write your answer here
+// 01 - since padStart(2, "0") adds 0 to the front because the string length is