London | Jan2026 | Ihor Taradaiko | Sprint 2 | Coursework/sprint 2

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

@@ -1,14 +1,18 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> write your prediction here - It will print 320 inside the function, but the template string will show "undefined" because multiply does not return a value.
 
 function multiply(a, b) {
   console.log(a * b);
 }
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+// =============> write your explanation here - multiply() uses console.log to display the result, but it doesn't return anything. In JavaScript, a function with no return statement returns undefined, so ${multiply(10, 32)} becomes undefined even though 320 was logged earlier.
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function multiplyFixed(a, b) {
+  return a * b;
+}
+console.log(`The result of multiplying 10 and 32 is ${multiplyFixed(10, 32)}`);

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

@@ -1,6 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
-
+//  =============> write your prediction here - should show undefined as there are ";" after return inside the function
 function sum(a, b) {
   return;
   a + b;
@@ -10,4 +9,9 @@ console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+//  =============> write your new code here - you can't divide the return parameters with ";"
+function sum(a, b) {
+  return a + b;
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

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

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> Write your prediction here - it should print last digit of 103 
 
 const num = 103;
 
@@ -14,11 +14,22 @@ 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 - we have set num as constant value 103, inside the function we use it as it is constant, ignoring other inputs
+// The last digit of 42 is 3
+// The last digit of 105 is 3
+// The last digit of 806 is 3
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> write your explanation here - 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+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
+// It wasn't working because it used the outer variable num instead of the input value

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

@@ -15,5 +15,8 @@
 // It should return their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
+  const bmi = weight / (height * height);
+  return Number(bmi.toFixed(1));
+}
+
+console.log(calculateBMI(70, 1.73));

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

@@ -14,3 +14,9 @@
 // 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 upperSnake(string)
+{
+    return string.trim().split(" ").join("_").toUpperCase()
+}
+console.log(upperSnake("hello there"))

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

@@ -4,3 +4,31 @@
 // 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
+
+function toPounds(str)
+{   
+// 1. const penceString = "399p": initialises a string variable with the value "399p"
+const penceStringWithoutTrailingP = str.substring(
+  0,
+  str.length - 1
+);
+
+//2. removes "P" from the string
+const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+//3. Ensures the string is at least 3 characters long by adding 0 to the start
+const pounds = paddedPenceNumberString.substring(
+  0,
+  paddedPenceNumberString.length - 2
+);
+
+//4. Extracts everything except the last 2 digits of paddedPenceNumberString
+const pence = paddedPenceNumberString
+  .substring(paddedPenceNumberString.length - 2)
+  .padEnd(2, "0");
+  return pence
+}
+//5. takes the last 2 digits as the pence from paddedPenceNumberStringCollapse comment
+console.log(toPounds("399p"))
+console.log(toPounds("400p"))
+console.log(toPounds("301p"))
+console.log(toPounds("302p"))

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

@@ -16,19 +16,19 @@ function formatTimeDisplay(seconds) {
 
 // Questions
 
-// a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// a) When formatTimeDisplay is called how many times will pad be called? 
+// =============> write your answer here - 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
+// b) What is the value assigned to num when pad is called for the first time? - 
+// =============> write your answer here - First call is pad(totalHours)
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> write your answer here - it returs 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
+// =============> write your answer here -  Last call is pad(remainingSeconds) For 61, remainingSeconds = 61 % 60 = 1, so num is 1.
 
 // 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
+// =============> write your answer here - With num = 1, pad(1) returns "01". "1".padStart(2, "0") adds zero to make it 2 characters long.

Sprint-2/5-stretch-extend/format-time.js

@@ -23,3 +23,17 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+
+console.log(formatAs12HourClock("23:14"))
+console.log(formatAs12HourClock("00:00"))
+console.log(formatAs12HourClock("00:01"))
+console.log(formatAs12HourClock("11:59"))
+console.log(formatAs12HourClock("12:00"))
+console.log(formatAs12HourClock("12:01"))
+console.log(formatAs12HourClock("13:45"))
+
+
+
+
+
+