Manchester | ITP-MAY-2026 | Yee Man Tsang | Sprint 2 | Coursework/Sprint-2

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

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> I predict this code will create a function which can capitalise the first letter of a string and keep the second letters to last one the same. This string is stored and return to the function call.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +9,8 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> The error message shows "SyntaxError: Identifier 'str' has already been declared". And it indicated the variable name 'str' at line 8, I think it triggered a syntax error when try to declare 'str' in the function while it is already being defined as a function parameter. So I changed it to 'strStored' in the function and it works.
+// =============> function capitalise(str) {
+//  let strStored = `${str[0].toUpperCase()}${str.slice(1)}`;
+//  return strStored;
+//}

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

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> I predict the error will occur as the declaration of variable 'decimalNumber' in line 9 will clash with the parameters input 'decimalNumber' to the function in line 8. 
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +14,11 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============> In case, the function is called with a parameter '0.4', I think the decimal number will be used to calculate the percentage in line 10. So whatever decimal number is input to the function makes no difference. The return value would always be 50%.
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> function convertToPercentage(decimalNumber) {
+// =============>   const percentage = `${decimalNumber * 100}%`;
+// =============>   return percentage;
+// =============> }
+// =============> console.log(convertToPercentage(0.4));

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

@@ -3,18 +3,21 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> I predict the error will be indicated to line 8 function square(3) as a value should not be input in the function declaration. If we need to input a value in the function expression. 
 
 function square(3) {
     return num * num;
 }
 
-// =============> write the error message here
+// =============> 'SyntaxError: Unexpected number' is shown and it indicates line 8 at number 3.
 
-// =============> explain this error message here
+// =============> I think the value 3 should not be input in the function declaration and instead it there should a parameter so the error will not be shown.
 
 // Finally, correct the code to fix the problem
 
-// =============> write your new code here
+// =============> function square(num) {
+// =============>     return num * num;
+// =============> }
+// =============> console.log(square(3));
 
 

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

@@ -1,14 +1,18 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> I predict the function will be called when the console try to print the sentence 'The result....'. In this case, two values 10 and 32 are inserted to this function. And a result will be calculated '10x32'. But I expected the function won't work exactly what people expect because I expect the result will be return instead of console print it to me. If I change this, I will expect the code works then.
 
 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
+// =============> When I run this code, the sentence 'The result of multiplying 10 and 32 is undefined' comes to me. I think it is caused by the missed return statement and no value will be returned to this result in the sentence.
 
 // 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

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> I predict an error will occur as the line 5 and 6 seems not to be a correct syntax to return a value that the function needs to. 
 
 function sum(a, b) {
   return;
@@ -8,6 +8,10 @@ function sum(a, b) {
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============> When I run the code, 'The sum of 10 and 32 is undefined' comes, it is because the line 5 and 6 need to be merge to properly return a value.
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+//  =============> 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
+// =============> I predict the code function in this file will extract the last digit of number for us. The function itself seems working fine and the function call statement should work fine too. But the issue is that there is a declaration of variable 'num' on line 6 which will fix all the input to the function statement so we cannot expect the correct return value in this code.
 
 const num = 103;
 
@@ -14,11 +14,18 @@ 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
+// =============> As expected, all the return value is '3' for the function with difference parameter called.
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============>  As the declared variable 'num' has been assigned with a fixed value. 
 // 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
+//The overall syntax in this code works fine and it trigger no error. But the code doesn't work properly and doesn't show the digit we expected is because it tried to declare the num with a fixed number in the beginning of code instead of putting it in the parenthesis of function. It makes the parameter cannot be successfully pass to the function, so the outcome will not be right.

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

@@ -15,5 +15,5 @@
 // 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
-}
+    return Number((weight / height**2).toFixed(1));
+}

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 upperSnakeCase(string){
+    const upperString = string.toUpperCase();
+    return upperString.replaceAll(' ','_');
+}

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

@@ -4,3 +4,19 @@
 // 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(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}`;
+}

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

@@ -21,18 +21,18 @@ function formatTimeDisplay(seconds) {
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> It will be called 3 times in line 15.
 
 // 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 will be assigned to num when pad is called for the first time.
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> 00 will be the return value when pad is called the first time.
 
 // 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 being called for the last time, it is on line 15 'pad(remainingSeconds)'. So a value of 1 will be assigned to it as remainingSeconds in line 10 was declared as 1.
 
 // e) What is the return value of pad when it is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> When pad is being called for the last time, it is on line 15 'pad(remainingSeconds)'. So a value of 1 will be assigned to function pad(num) where num is in value of 1. In line 3, as this string is smaller than 2 which means it is only in 1 digit, we add a '0' in front of it. So it return a numString '01' to the line 15.

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

@@ -1,11 +1,23 @@
 // This is the latest solution to the problem from the prep.
 // Make sure to do the prep before you do the coursework
 // Your task is to write tests for as many different groups of input data or edge cases as you can, and fix any bugs you find.
+function pad(num) {
+  let numString = num.toString();
+  if (numString.length < 2) {
+    numString = "0" + numString;
+  }
+  return numString;
+}
 
 function formatAs12HourClock(time) {
   const hours = Number(time.slice(0, 2));
+  const minute = time.slice(3,5);
   if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+    return `${pad(hours - 12)}:${minute} pm`;
+  } else if (hours == 12){
+    return `12:${minute} pm`;
+  } else if (hours == 00){
+    return `12:${minute} am`;
   }
   return `${time} am`;
 }
@@ -21,5 +33,75 @@ const currentOutput2 = formatAs12HourClock("23:00");
 const targetOutput2 = "11:00 pm";
 console.assert(
   currentOutput2 === targetOutput2,
-  `current output: ${currentOutput2}, target output: ${targetOutput2}`
+  `2current output: ${currentOutput2}, target output: ${targetOutput2}`
+);
+
+const currentOutput3 = formatAs12HourClock("23:59");
+const targetOutput3 = "11:59 pm";
+console.assert(
+  currentOutput3 === targetOutput3,
+  `current output: ${currentOutput3}, target output: ${targetOutput3}`
+);
+
+const currentOutput4 = formatAs12HourClock("01:31");
+const targetOutput4 = "01:31 am";
+console.assert(
+  currentOutput4 === targetOutput4,
+  `current output: ${currentOutput4}, target output: ${targetOutput4}`
+);
+
+const currentOutput5 = formatAs12HourClock("00:00");
+const targetOutput5 = "12:00 am";
+console.assert(
+  currentOutput5 === targetOutput5,
+  `current output: ${currentOutput5}, target output: ${targetOutput5}`
+);
+
+const currentOutput6 = formatAs12HourClock("12:00");
+const targetOutput6 = "12:00 pm";
+console.assert(
+  currentOutput6 === targetOutput6,
+  `current output: ${currentOutput6}, target output: ${targetOutput6}`
+);
+
+const currentOutput7 = formatAs12HourClock("15:25");
+const targetOutput7 = "03:25 pm";
+console.assert(
+  currentOutput7 === targetOutput7,
+  `current output: ${currentOutput7}, target output: ${targetOutput7}`
+);
+
+const currentOutput8 = formatAs12HourClock("00:08");
+const targetOutput8 = "12:08 am";
+console.assert(
+  currentOutput8 === targetOutput8,
+  `current output: ${currentOutput8}, target output: ${targetOutput8}`
+);
+
+const currentOutput9 = formatAs12HourClock("08:35");
+const targetOutput9 = "08:35 am";
+console.assert(
+  currentOutput9 === targetOutput9,
+  `current output: ${currentOutput9}, target output: ${targetOutput9}`
+);
+
+const currentOutput10 = formatAs12HourClock("20:35");
+const targetOutput10 = "08:35 pm";
+console.assert(
+  currentOutput10 === targetOutput10,
+  `current output: ${currentOutput10}, target output: ${targetOutput10}`
+);
+
+const currentOutput11 = formatAs12HourClock("12:34");
+const targetOutput11 = "12:34 pm";
+console.assert(
+  currentOutput11 === targetOutput11,
+  `current output: ${currentOutput11}, target output: ${targetOutput11}`
+);
+
+const currentOutput12 = formatAs12HourClock("00:34");
+const targetOutput12 = "12:34 am";
+console.assert(
+  currentOutput12 === targetOutput12,
+  `current output: ${currentOutput12}, target output: ${targetOutput12}`
 );