Glasgow | May-2025 | Adiyah Farhan | Sprint-2

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

@@ -1,13 +1,30 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// I am unable to predict the error right now.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
+/*function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
 
+output = capitalise("my name is adiyah");
+console.log(output);*/
+
 // =============> write your explanation here
+
+/* SyntaxError: Identifier 'str' has already been declared.
+    This error occurs because the function parameter name and the variable name declared inside 
+    the function is same. This error can be fixed by either changing the parameter name or the variable name.
+*/
 // =============> write your new code here
+
+function capitalize(str) {
+  let inputStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return inputStr;
+}
+
+let output = capitalize("my name is Adiyah");
+console.log(output);

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

@@ -2,19 +2,38 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+/* Error will occur because the variable 'decimalNumber' declared inside the function and it should not
+   be passed as a parameter. Also variable decimalNumber is defined in the local scope and it cannot
+   be used in the global scope in 'console.log()'
+*/
 
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
+/*function convertToPercentage(decimalNumber) {
   const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(decimalNumber);
+console.log(decimalNumber);*/
 
 // =============> write your explanation here
+/* SyntaxError: Identifier 'decimalNumber' has already been declared occurs because
+   the same name is used for the parameter
+*/
+/* ReferenceError: decimalNumber is not defined occurs because it is defined inside the function and not
+   recognized in the global scope
+*/
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+result = convertToPercentage(0.6);
+console.log(result);

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

@@ -1,20 +1,30 @@
-
 // Predict and explain first BEFORE you run any code...
 
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+// The error occurs because we pass a number as a parameter instead of passing the variable
+// num which we return through the function.
 
-function square(3) {
+/*function square(3) {
     return num * num;
 }
+ */
 
 // =============> write the error message here
+// SyntaxError: Unexpected number
 
 // =============> explain this error message here
+// It says the number pass through the parameter is not a valid argument
+// instead the variable must be used.
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
+function square(num) {
+  return num * num;
+}
 
+let result = square(3);
+console.log(result);

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

@@ -1,14 +1,24 @@
 // Predict and explain first...
 
 // =============> write your prediction here
+// In line 10 the function 'multiply(a, b)' called which doesn't return any value.
 
-function multiply(a, b) {
+/*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
+// The function should return a value for which we need to
+// replace the console.log() function with the return value
 
 // 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 +1,22 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// function doesn't return any value and print 'undefined' in console.log().
 
-function sum(a, b) {
+/*function sum(a, b) {
   return;
   a + b;
 }
 
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);*/
 
 // =============> write your explanation here
+// The function first returns the value with is null and then the calculation takes place which doesn't return.
+
 // 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

@@ -2,23 +2,43 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+// Predicted Output:
+// The last digit of 42 is 3
+// The last digit of 105 is 3
+// The last digit of 806 is 3
 
-const num = 103;
+/*const num = 103;
 
 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)}`);
+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
+// 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
+// Because it returns the value of the 'num' which is declared with the value '103'.
+// And the function doesn't accept any parameters.
+
 // 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 function doesn't work properly because the number wasn't pass as a parameter before.

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

@@ -15,5 +15,13 @@
 // 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 the BMI of someone based off their weight and height
+  const heightSquare = height * height;
+  const BMI = weight / heightSquare;
+  const scaledBMI = BMI.toFixed(1);
+  return Number(scaledBMI);
+}
+
+result = calculateBMI(80, 1.89);
+console.log(result);
+//console.log(typeof calculateBMI());

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

@@ -14,3 +14,12 @@
 // 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 convertUpper_snake_case(str) {
+  const caseConvert = str.toUpperCase();
+  const convertToSnakeCase = caseConvert.replaceAll(" ", "_");
+  return convertToSnakeCase;
+}
+
+const caseConverter = convertUpper_snake_case("lord of the rings");
+console.log(caseConverter);

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

@@ -4,3 +4,26 @@
 // 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 convertToPounds(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");
+
+  const convertAmount = "£" + pounds + "." + pence;
+  return convertAmount;
+}
+
+let convertedAmount = convertToPounds("450p");
+console.log(convertedAmount);

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

@@ -17,18 +17,18 @@ function formatTimeDisplay(seconds) {
 // Questions
 
 // 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
+// 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
+// 1. num is assigned the value of remaining seconds.
 
 // 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. It padded the value to 2 digits.

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

@@ -4,8 +4,13 @@
 
 function formatAs12HourClock(time) {
   const hours = Number(time.slice(0, 2));
+  const minutes = time.slice(3, 5);
   if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+    return `${hours - 12}:${minutes} pm`;
+  } else if (hours == 0) {
+    return `12:${minutes} am`;
+  } else if (hours == 12) {
+    return `${time} pm`;
   }
   return `${time} am`;
 }
@@ -23,3 +28,24 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+
+const currentOutput3 = formatAs12HourClock("23:45");
+const targetOutput3 = "11:45 pm";
+console.assert(
+  currentOutput3 === targetOutput3,
+  `current output: ${currentOutput3}, target output: ${targetOutput3}`
+);
+
+const currentOutput4 = formatAs12HourClock("00:59");
+const targetOutput4 = "12:59 am";
+console.assert(
+  currentOutput4 === targetOutput4,
+  `current output: ${currentOutput4}, target output: ${targetOutput4}`
+);
+
+const currentOutput5 = formatAs12HourClock("12:34");
+const targetOutput5 = "12:34 pm";
+console.assert(
+  currentOutput5 === targetOutput5,
+  `current output: ${currentOutput5}, target output: ${targetOutput5}`
+);