London | Sep-2025 | Gislaine Della Bella | Sprint 2 | coursework-sprint-2

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

@@ -4,10 +4,23 @@
 // call the function capitalise with a string input
 // 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;
+// }
 
 // =============> write your explanation here
+
+// Error at line 8 
+//SyntaxError: Identifier 'str' has already been declared
+// the function has alreayd a parameter called "str"and 
+// we are trying decare a new variable with the same name 
+
 // =============> write your new code here
+
+function capitalise(str) {
+  let newCap = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return newCap;
+}
+console.log(capitalise("hello"));
+console.log(capitalise("apple"));

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

@@ -5,16 +5,34 @@
 
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
-  const percentage = `${decimalNumber * 100}%`;
+// function convertToPercentage(decimalNumber) { 
+//   const decimalNumber = 0.5;
+//   const percentage = `${decimalNumber * 100}%`;
 
-  return percentage;
-}
+// return percentage;
+// }
 
-console.log(decimalNumber);
+// console.log(decimalNumber);
 
 // =============> write your explanation here
 
+// declaration variable name has been declared the same in the function declaration
+//(decimalNumber) and inside the function in a new variable line 9 = const decimalNumber
+
+//SyntaxError: Identifier 'decimalNumber' has already been declared
+
+
+
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+//using the function with any code:
+
+function convertToPercentage(decimalNumber) {
+
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+console.log(convertToPercentage( 0.5));
+console.log(convertToPercentage(2));

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

@@ -5,16 +5,25 @@
 
 // =============> write your prediction of the error here
 
-function square(3) {
-    return num * num;
-}
+// function square(3) {
+//     return num * num;
+// }
 
 // =============> write the error message here
+//SyntaxError: Unexpected number
+
 
 // =============> explain this error message here
+// passing nunber 3 in the function without declarint it as a number to be square 
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
+function square(num) {
+    const squareNumber= (num * num);
+    return squareNumber ;
+}
 
+console.log (square(3));
+console.log (square(4));

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

@@ -8,7 +8,20 @@ function multiply(a, b) {
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
+//output= The result of multiplying 10 and 32 is undefined
+
 // =============> write your explanation here
+//The function runs console.log(10 * 32) print the result = 320 
+// after it runs the function dosen't have a return anything ang gives =  undefined.
 
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+//  =============> to use the function that gives a result need to use RETURN not consol.log inside the function
+
+function multiply(a, b) {
+  const forAllMutiply = (a * b);
+  return forAllMutiply; //return can be use for diferents values/results
+}
+
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+
+//output= The result of multiplying 10 and 32 is 320

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

@@ -1,13 +1,25 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> looking at it I think the sytntaks is worng return; a+b;
+
+// function sum(a, b) {
+//   return;
+//   a + b;
+// }
+
+// console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+
+// =============> 
+//   I declare in the scope of function what a,b need to do return  
+// call the function with the template literal 
+// wich will give me the Text sentence with the result of any sum 
+
+// Finally, correct the code to fix the problem
+//  =============> 
 
 function sum(a, b) {
-  return;
-  a + b;
+   const newSum = a + b;
+   return newSum;
+
 }
 
 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

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

@@ -1,24 +1,42 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> it is declaring num fisrt wich wil work but the function will stop after the 
+//calculate 103 results. after run Return if the results.
 
-const num = 103;
+// I din't predict rigt it gives the results all using the const Num= 103 
 
-function getLastDigit() {
-  return num.toString().slice(-1);
-}
+// the consolo.log wont work 
 
-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)}`);
+// 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)}`);
 
 // Now run the code and compare the output to your prediction
 // =============> write the output here
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> it is using the const 103 for all the results
+
 // 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(numtoCalculate) { //give a input to the function to use 
+  const num = numtoCalculate.toString().slice(-1); //declare a const adding values to what to do
+  return num; // return the process
+}
+
+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)}`);
+
+//output
+// The last digit of 42 is 2
+// The last digit of 105 is 5
+// The last digit of 806 is 6

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

@@ -15,5 +15,14 @@
 // 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 heightSquare = height * height;
+  let wheightCal = weight / heightSquare;
+  let result1 = wheightCal.toFixed(1);
+  //toFixed() returns a string, not a number.
+  // need to convert the result to a number
+  let tranftoNumber= parseFloat(result1);
+  return tranftoNumber;
+}
+
+console.log (calculateBMI (56, 1.65))
+// return the BMI of someone based off their weight and height

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

@@ -14,3 +14,21 @@
 // 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
+
+
+//1- methodo that take space add _ ?
+//2- methodo find first index of ech word
+//3- methodo to tranform string to upercase = toUpperCase()
+//4- return the value 
+
+
+
+function takeSapcestoUpercase (textSnake){
+
+    let takespace = textExemple.split(" ");// returns array nned to tranform to string again before upercase
+    let transfStringAgain = takespace.join("_");
+    let changeUper = transfStringAgain.toUpperCase(1);
+    return changeUper;
+};
+   let textExemple = "hello there";
+console.log(takeSapcestoUpercase(textExemple));

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

@@ -1,6 +1,43 @@
 // In Sprint-1, there is a program written in interpret/to-pounds.js
 
 // You will need to take this code and turn it into a reusable block of code.
+
+// need to get car price = let fullPrice
+//need get priceOneyear= let priceOneyear
+// need take the spaces off the both variables
+//need check the diference of the prices 
+//multiplay the result for 100 to check the percentage 
+// return the result with template literals
+
+//function needs to be valid with diferents inputs
+
 // 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
+
+
+// let carPrice = "10,000";
+// let priceAfterOneYear = "8,543";
+
+// carPrice = Number(carPrice.replaceAll(",", ""));// 10000
+// priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",","")); //8543
+
+// const priceDifference = carPrice - priceAfterOneYear; //1457
+// const percentageChange = (priceDifference / carPrice) * 100; //145700
+
+// console.log(`The percentage change is ${percentageChange}`); //14.57
+
+function toPounds(fullPrice, priceOneyear) {
+
+  fullPrice = Number(fullPrice.replaceAll(",", ""));
+ priceOneyear = Number(priceOneyear.replaceAll(",", ""));
+
+  const priceDifference = fullPrice - priceOneyear;
+
+  const percentageChange = (priceDifference / fullPrice) * 100;
+
+// console.log(`The percentage change is ${percentageChange}`);
+ return percentageChange;
+}
+
+console.log (toPounds( "100,000", "98,000"));

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

@@ -2,33 +2,34 @@ function pad(num) {
   return num.toString().padStart(2, "0");
 }
 
-function formatTimeDisplay(seconds) {
-  const remainingSeconds = seconds % 60;
-  const totalMinutes = (seconds - remainingSeconds) / 60;
-  const remainingMinutes = totalMinutes % 60;
-  const totalHours = (totalMinutes - remainingMinutes) / 60;
+function formatTimeDisplay(seconds) { // seconds = 61
+  const remainingSeconds = seconds % 60; // 1
+  const totalMinutes = (seconds - remainingSeconds) / 60; // 61 - 1) / 60 = 1
+  const remainingMinutes = totalMinutes % 60; // 1 / 60 = 1
+  const totalHours = (totalMinutes - remainingMinutes) / 60; // 0
 
   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
+// 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
+// 01

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

@@ -23,3 +23,38 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+
+const currentOutput3 = formatAs12HourClock("19:00");
+const targetOutput3 = "7:00 pm";
+console.assert(
+  currentOutput2 === targetOutput2,
+  `current output: ${currentOutput2}, target output: ${targetOutput2}`
+);
+
+const currentOutput5 = formatAs12HourClock("19:00");
+const targetOutput5 = "7:00 pm";
+console.assert(
+  currentOutput2 === targetOutput2,
+  `current output: ${currentOutput2}, target output: ${targetOutput2}`
+);
+
+const currentOutput4 = formatAs12HourClock("22:00");
+const targetOutput4 = "10:00 pm";
+console.assert(
+  currentOutput2 === targetOutput2,
+  `current output: ${currentOutput2}, target output: ${targetOutput2}`
+);
+
+const currentOutput6 = formatAs12HourClock("22:00.   ");
+const targetOutput6= "10:00 pm";
+console.assert(
+  currentOutput2 === targetOutput2,
+  `current output: ${currentOutput2}, target output: ${targetOutput2}`
+);
+
+const currentOutput6 = formatAs12HourClock("22:00.   ");
+const targetOutput6 = "10:00 pm";
+console.assert(
+  currentOutput2 === targetOutput2,
+  `current output: ${currentOutput2}, target output: ${targetOutput2}`
+);