hamdiheb · hamdiheb · Nov 27, 2025 · Nov 27, 2025 · Nov 27, 2025 · Nov 27, 2025
diff --git a/Sprint-1/1-key-exercises/1-count.js b/Sprint-1/1-key-exercises/1-count.js
@@ -4,3 +4,4 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+// In line 3 we are adding 1 to the current value of count, the = symbole is the assignment operator which means store the value on the right side into the variable on the left side
diff --git a/Sprint-1/1-key-exercises/2-initials.js b/Sprint-1/1-key-exercises/2-initials.js
@@ -5,7 +5,8 @@ let lastName = "Johnson";
 // Declare a variable called initials that stores the first character of each string.
 // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
 
-let initials = ``;
+let initials = firstName[0]+middleName[0]+lastName[0];
+console.log(initials);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 
diff --git a/Sprint-1/1-key-exercises/3-paths.js b/Sprint-1/1-key-exercises/3-paths.js
@@ -11,13 +11,18 @@
 
 const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
 const lastSlashIndex = filePath.lastIndexOf("/");
+console.log(lastSlashIndex);
 const base = filePath.slice(lastSlashIndex + 1);
+console.log(base);
 console.log(`The base part of ${filePath} is ${base}`);
 
 // Create a variable to store the dir part of the filePath variable
 // Create a variable to store the ext part of the variable
 
-const dir = ;
-const ext = ;
+
+const dir = filePath.slice(filePath[0],lastSlashIndex);
+const ext = filePath.slice(filePath.lastIndexOf("."),filePath.length);
+
+console.log(`The dir Part is ${dir} and the ext Part is ${ext}`);
 
 // https://www.google.com/search?q=slice+mdn
diff --git a/Sprint-1/1-key-exercises/4-random.js b/Sprint-1/1-key-exercises/4-random.js
@@ -1,9 +1,15 @@
 const minimum = 1;
 const maximum = 100;
 
-const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+let random_number=Math.random(); //Math.random() is pre defined javascript function which generate an integer or float  
+const num = Math.floor(random_number * (maximum - minimum + 1)) + minimum; //Math.floor is pre defined javascript function which return the closest lowest number to the gived parameter 
+
+console.log(`Our random number is ${random_number} and if we multiply it by ${maximum+minimum+1} it will be = ${random_number * (maximum - minimum +1) + minimum} and the closest down round is ${num}`);
 
 // In this exercise, you will need to work out what num represents?
 // Try breaking down the expression and using documentation to explain what it means
 // It will help to think about the order in which expressions are evaluated
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
+
+
+//Num represent integer number round between 1 and 100
diff --git a/Sprint-1/2-mandatory-errors/0.js b/Sprint-1/2-mandatory-errors/0.js
@@ -1,2 +1,2 @@
-This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
+//This is just an instruction for the first activity - but it is just for human consumption
+//We don't want the computer to run these 2 lines - how can we solve this problem?
diff --git a/Sprint-1/2-mandatory-errors/1.js b/Sprint-1/2-mandatory-errors/1.js
@@ -1,4 +1,4 @@
 // trying to create an age variable and then reassign the value by 1
-
-const age = 33;
+// it's a const variable , const variable can't be changed we need to change it to let 
+let age = 33;
 age = age + 1;
diff --git a/Sprint-1/2-mandatory-errors/2.js b/Sprint-1/2-mandatory-errors/2.js
@@ -1,5 +1,6 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
-
-console.log(`I was born in ${cityOfBirth}`);
+//cityofbirth is intialized after console.log which can not be readable only if it is before the console.log
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);
+
diff --git a/Sprint-1/2-mandatory-errors/3.js b/Sprint-1/2-mandatory-errors/3.js
@@ -1,9 +1,11 @@
-const cardNumber = 4533787178994213;
+const cardNumber = '4533787178994213';
 const last4Digits = cardNumber.slice(-4);
 
 // The last4Digits variable should store the last 4 digits of cardNumber
 // However, the code isn't working
 // Before running the code, make and explain a prediction about why the code won't work
+//.slice is working only on string or array and cardNumber values are integer
 // Then run the code and see what error it gives.
+//The error slice is not a function
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
diff --git a/Sprint-1/2-mandatory-errors/4.js b/Sprint-1/2-mandatory-errors/4.js
@@ -1,2 +1,4 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+const _12HourClockTime = "20:53";
+const _24hourClockTime = "08:53";
+
+//Javascript variables name can not start with a number, only a letter,underscore or dollar sign
diff --git a/Sprint-1/3-mandatory-interpret/1-percentage-change.js b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
@@ -2,7 +2,7 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -12,11 +12,16 @@ console.log(`The percentage change is ${percentageChange}`);
 // Read the code and then answer the questions below
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
+//We have called function number twice , line 4 and line 5
 
 // b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
+//line 5 replaceall method doesn't have the correct paramter as comma is missing 
 
 // c) Identify all the lines that are variable reassignment statements
+//line 4 and 5 are variable reassignment 
 
 // d) Identify all the lines that are variable declarations
+//line 1,2,7 and 8 are lines for variable declarations
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+//replaceall method replace the existent variable with different variable given on paramter for both
diff --git a/Sprint-1/3-mandatory-interpret/2-time-format.js b/Sprint-1/3-mandatory-interpret/2-time-format.js
@@ -1,4 +1,4 @@
-const movieLength = 8784; // length of movie in seconds
+const movieLength = 1000000; // length of movie in seconds
 
 const remainingSeconds = movieLength % 60;
 const totalMinutes = (movieLength - remainingSeconds) / 60;
@@ -12,14 +12,20 @@ console.log(result);
 // For the piece of code above, read the code and then answer the following questions
 
 // a) How many variable declarations are there in this program?
+//6 variables 
 
 // b) How many function calls are there?
+//We have no function called 
 
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+//This represent the rest seconds after calculating ho many minutes , as % will give the rest
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+//Totalminutes will show how many minutes in the movie
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+//result variable will show the exact film duration in hours, minutes and seconds i prefer calling the variable name movie_duration
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+//Correct this code will work for all values
diff --git a/Sprint-1/3-mandatory-interpret/3-to-pounds.js b/Sprint-1/3-mandatory-interpret/3-to-pounds.js
@@ -1,20 +1,24 @@
-const penceString = "399p";
+const penceString = "399p"; //initialises a string variable with the value "399p"
 
 const penceStringWithoutTrailingP = penceString.substring(
   0,
   penceString.length - 1
-);
+); //This variable will have value of 399
+console.log(penceStringWithoutTrailingP);
+
+const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"); //This variable will have value of 399 without adding any 0 because target length already 3
+console.log(paddedPenceNumberString);
 
-const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
 const pounds = paddedPenceNumberString.substring(
   0,
   paddedPenceNumberString.length - 2
-);
+); // This variable value will be 3
+console.log(pounds);
 
 const pence = paddedPenceNumberString
-  .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
-
+  .substring(paddedPenceNumberString.length - 2)//Here we will copy last 99
+  .padEnd(2, "0"); //padend function will not works because target length already 2
+console.log(pence);
 console.log(`£${pounds}.${pence}`);
 
 // This program takes a string representing a price in pence

diff --git a/Sprint-1/4-stretch-explore/chrome.md b/Sprint-1/4-stretch-explore/chrome.md
@@ -11,8 +11,12 @@ In the Chrome console,
 invoke the function `alert` with an input string of `"Hello world!"`;
 
 What effect does calling the `alert` function have?
+//Alert function showing alert on your browser
 
 Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
 
 What effect does calling the `prompt` function have?
+//prompt function is an alert function that can store data into variables
+
 What is the return value of `prompt`?
+//undefined
diff --git a/Sprint-1/4-stretch-explore/objects.md b/Sprint-1/4-stretch-explore/objects.md
@@ -7,10 +7,14 @@ Open the Chrome devtools Console, type in `console.log` and then hit enter
 What output do you get?
 
 Now enter just `console` in the Console, what output do you get back?
-
+ƒ log() { [native code] }
 Try also entering `typeof console`
+object
 
 Answer the following questions:
 
 What does `console` store?
+Console stores all command that you can need to debug the code
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+Console.log will display the code to the console , while console.assert is meant to test your code and show you the message you are including 
+. to choose which built in function from library of console.
diff --git a/Sprint-1/readme.md b/Sprint-1/readme.md
@@ -33,3 +33,6 @@ https://developer.mozilla.org/en-US/docs/Web/JavaScript
 ## 4 Explore - Stretch 💪
 
 This stretch activity will get you to start exploring new concepts and environments by yourself. It will do so by prompting you to reflect on some questions.
+
+
+Working on Sprint 1 
diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
@@ -1,13 +1,19 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> This function should return first letter of the input string capitalised + from second letter of the input string till the end using slice function
 
 // 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)}`;
+  //let str_final = `${str[0].toUpperCase()}${str.slice(1)}`;
+  //return str_final;
+
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> str variable is input that has been declared in the function parameter, we can not redeclare a parameter variable 
+// =============> we can declare new variable to receive the final result or not declare again the variable and return directly
+
+console.log(capitalise("iheb"));
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
@@ -1,20 +1,26 @@
-// Predict and explain first...
+// Here we have a function that convert decimal number to percentage
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> Because a global variable is being declared again inside a function and we are not calling the function on the 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);
-
-// =============> write your explanation here
+}*/
+//console.log(decimalNumber);
+// =============> Because a global variable is being declared again inside a function and we are not calling the function on the console.log
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  decimalNumber = 0.5;
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+console.log(convertToPercentage());
diff --git a/Sprint-2/1-key-errors/2.js b/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
+// =============> we are passing value as parameter , we need to pass variable name
 
-function square(3) {
+/*function square(3) {
     return num * num;
-}
+}*/
 
-// =============> write the error message here
+// =============> SyntaxError: Unexpected number
 
-// =============> explain this error message here
+// =============> we have invalid code which causing the error 
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
 
+function square(num) {
+    return num*num;
+}
diff --git a/Sprint-2/2-mandatory-debug/0.js b/Sprint-2/2-mandatory-debug/0.js
@@ -1,14 +1,20 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> i think we can not console log twice , the function should return data to the console log otherwise we will have undefined 
 
-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
 
 // 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)}`);
diff --git a/Sprint-2/2-mandatory-debug/1.js b/Sprint-2/2-mandatory-debug/1.js
@@ -1,13 +1,19 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> i think we will have syntax error 
 
-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
+// =============> we didn't have error but the function is not working because we are not returning as line 5 is closed by ;
 // 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)}`);
Original file line number	Diff line number	Diff line change
Expand Up		@@ -4,3 +4,4 @@ count = count + 1;

		// Line 1 is a variable declaration, creating the count variable with an initial value of 0
		// Describe what line 3 is doing, in particular focus on what = is doing
		// In line 3 we are adding 1 to the current value of count, the = symbole is the assignment operator which means store the value on the right side into the variable on the left side
Original file line number	Diff line number	Diff line change
Expand Up		@@ -33,3 +33,6 @@ https://developer.mozilla.org/en-US/docs/Web/JavaScript
		## 4 Explore - Stretch 💪

		This stretch activity will get you to start exploring new concepts and environments by yourself. It will do so by prompting you to reflect on some questions.


		Working on Sprint 1