Brussels | ITP-2025-1 | Preeti Tyagi | Week 5 | Sprint 2 all exercices

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

@@ -1,13 +1,16 @@
 // Predict and explain first...
-//  =============> write your prediction here
 
-// call the function capitalise with a string input
-// interpret the error message and figure out why an error is occurring
+
+//function capitalise(str) {    //function already declares a parameter named str. 
+//let str = `${str[0].toUpperCase()}${str.slice(1)}`;   //to declare another variable called str using let, which is not allowed
+// return str;
+//}
+
+
+// here is the new code
 
 function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
+let result = `${str[0].toUpperCase()}${str.slice(1)}`; //Taking the first character of the string and converts it to uppercase and rest of the string, starting from index 1.
+  return result;
 }
 
-// =============> write your explanation here
-// =============> write your new code here

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

@@ -1,20 +1,33 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+
+//variable decimalNumber is already declared, we are trying to declare again 
+// console.log will throw an error since decimal no is not declared outside function
 
 // 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);
+console.log(decimalNumber);*/
 
 // =============> write your explanation here
 
+// function call is required and value for the variable 'decimalNumber' should be passed through the function
+
+
 // 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(0.5));
+

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

@@ -3,18 +3,25 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// Variable should be declared as "num" and later value should be passed to "num" > write your prediction of the error here
 
-function square(3) {
+/*function square(3) {
     return num * num;
-}
+}*/
 
-// =============> write the error message here
+// SyntaxError: Unexpected number > write the error message here
 
-// =============> explain this error message here
+// can’t put a number (3) as a parameter name.
+//Function parameters must be identifiers (like num, x, or value), not literal values.
+//returning num * num, but num is never defined> explain this error message here
 
 // 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 +1,19 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// console.log is used to print the output, but here it is used in the function call, which is not the correct approach> write your prediction here
 
-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)}`);
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);*/
 
-// =============> write your explanation here
+// We need to return the value instead of just logging it inside the function.> write your explanation here
 
 // 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 +1,19 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  with return we should give some value that comes in the output> write your prediction here
 
-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
+// a+b should be used after return in line 5> write your explanation here
 // 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

@@ -1,24 +1,38 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// console.log should be return only 103> Write your prediction here
 
-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> write the output here*/
 // Explain why the output is the way it is
-// =============> write your explanation here
+// because we have provided a constant value 103 to num> write your explanation here
 // Finally, correct the code to fix the problem
-// =============> write your new code here
 
-// This program should tell the user the last digit of each number.
-// Explain why getLastDigit is not working properly - correct the problem
+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: yes
+/* here is the new output
+The last digit of 42 is 2
+The last digit of 105 is 5
+The last digit of 806 is 6*/
+// now I have defined a function that takes one argument, num. also removed const funtion

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) {
-    // return the BMI of someone based off their weight and height
-}
+  let bmi = weight / (height * height);
+  return bmi.toFixed(1);
+}
+console.log(calculateBMI(70, 1.68));

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

@@ -14,3 +14,7 @@
 // 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
+
+const sentence = "hello there";
+
+console.log(sentence.toUpperCase().replace(/ /g, "_"));

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

@@ -4,3 +4,30 @@
 // 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) {
+  // Remove the trailing 'p'
+  const penceStringWithoutTrailingP = penceString.substring(
+    0,
+    penceString.length - 1
+  );
+
+  // Make sure it's at least 3 digits (e.g., '9' -> '009')
+  const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+
+  // Split into pounds and pence parts
+  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("9p")); // £0.09
+console.log(toPounds("50p")); // £0.50
+console.log(toPounds("1234p")); // £12.34
+console.log(toPounds("7p")); // £0.07

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

@@ -10,25 +10,28 @@ function formatTimeDisplay(seconds) {
 
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
+console.log(formatTimeDisplay(61));
 
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
 
 // 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
+// when pad function is called 3rd time pad(remainingSeconds) -> remainingSeconds = 1
+// 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
+// when pad function is called 3rd time pad(remainingSeconds) -> remainingSeconds = 1, but after padding it becomes 01 and returns it
+// 01

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

@@ -23,3 +23,22 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+// Morning times
+console.assert(formatAs12HourClock("01:00") === "01:00 am");
+console.assert(formatAs12HourClock("11:30") === "11:30 am");
+
+// Noon
+console.assert(formatAs12HourClock("12:00") === "12:00 pm");
+
+// Afternoon
+console.assert(formatAs12HourClock("13:15") === "01:15 pm");
+console.assert(formatAs12HourClock("15:45") === "03:45 pm");
+
+// Evening
+console.assert(formatAs12HourClock("23:59") === "11:59 pm");
+
+// Midnight
+console.assert(formatAs12HourClock("00:00") === "12:00 am");
+console.assert(formatAs12HourClock("00:30") === "12:30 am");
+
+console.log(" All tests passed!");