diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..a66d882
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,17 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "pwa-node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${workspaceFolder}\\week-1\\1-exercises\\B-hello-world\\exercise.js"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..7a3e4f4
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,7 @@
+{
+    "editor.formatOnSave": true,
+    "editor.formatOnPaste": true,
+    "launch": {
+    
+    }
+}
\ No newline at end of file
diff --git a/week-1/0-freecodecamp/Screenshot (434).png b/week-1/0-freecodecamp/Screenshot (434).png
new file mode 100644
index 0000000..e12dd58
Binary files /dev/null and b/week-1/0-freecodecamp/Screenshot (434).png differ
diff --git a/week-1/1-exercises/A-setup-ide/README.md b/week-1/1-exercises/A-setup-ide/README.md
index 1412871..c46a226 100644
--- a/week-1/1-exercises/A-setup-ide/README.md
+++ b/week-1/1-exercises/A-setup-ide/README.md
@@ -11,3 +11,6 @@ There are some tools that will help you to write code. One of these, [Prettier](
 * In Visual Studio open the settings file (see https://code.visualstudio.com/docs/getstarted/settings#_creating-user-and-workspace-settings)
 * Search for `editor format`
 * Set `editor.formatOnSave` and `editor.formatOnPaste` to true
+
+
+I installed the prettier and Enabled the formatting on save.
\ No newline at end of file
diff --git a/week-1/1-exercises/B-hello-world/README.md b/week-1/1-exercises/B-hello-world/README.md
index 2ac9fe5..66a9148 100644
--- a/week-1/1-exercises/B-hello-world/README.md
+++ b/week-1/1-exercises/B-hello-world/README.md
@@ -15,4 +15,6 @@ Inside of `exercise.js` there's a line of code that will print "Hello world!".
 * Try to `console.log()` something different. For example, 'Hello World. I just started learning JavaScript!'.
 * Try to console.log() several things at once.
 * What happens when you get rid of the quote marks?
+  If we pass string without quotes it gives a syntax error.
 * What happens when you console.log() just a number without quotes?
+  The number is displayed on the console.
diff --git a/week-1/1-exercises/B-hello-world/exercise.js b/week-1/1-exercises/B-hello-world/exercise.js
index b179ee9..9c382b3 100644
--- a/week-1/1-exercises/B-hello-world/exercise.js
+++ b/week-1/1-exercises/B-hello-world/exercise.js
@@ -1 +1,3 @@
-console.log("Hello world");
+console.log("Hello world, I am very excited about learning JavaScript.");
+console.log("My name is Ali Haider");
+console.log(1234);
diff --git a/week-1/1-exercises/C-variables/exercise.js b/week-1/1-exercises/C-variables/exercise.js
index a6bbb97..3244c32 100644
--- a/week-1/1-exercises/C-variables/exercise.js
+++ b/week-1/1-exercises/C-variables/exercise.js
@@ -1,3 +1,5 @@
 // Start by creating a variable `greeting`
-
+var greeting = "Hello World";
+console.log(greeting);
+console.log(greeting);
 console.log(greeting);
diff --git a/week-1/1-exercises/D-strings/exercise.js b/week-1/1-exercises/D-strings/exercise.js
index 2cffa6a..eae819e 100644
--- a/week-1/1-exercises/D-strings/exercise.js
+++ b/week-1/1-exercises/D-strings/exercise.js
@@ -1,3 +1,5 @@
 // Start by creating a variable `message`
-
+var message = "This is a string";
+var messageType = typeof message ;
 console.log(message);
+console.log(messageType);
\ No newline at end of file
diff --git a/week-1/1-exercises/E-strings-concatenation/exercise.js b/week-1/1-exercises/E-strings-concatenation/exercise.js
index 2cffa6a..6e2f022 100644
--- a/week-1/1-exercises/E-strings-concatenation/exercise.js
+++ b/week-1/1-exercises/E-strings-concatenation/exercise.js
@@ -1,3 +1,5 @@
 // Start by creating a variable `message`
-
-console.log(message);
+var greetingStart = "Hello, my name is ";
+var name = "Daniel";
+var greeting = greetingStart + name;
+console.log(greeting);
diff --git a/week-1/1-exercises/F-strings-methods/exercise.js b/week-1/1-exercises/F-strings-methods/exercise.js
index 2cffa6a..5a5f20d 100644
--- a/week-1/1-exercises/F-strings-methods/exercise.js
+++ b/week-1/1-exercises/F-strings-methods/exercise.js
@@ -1,3 +1,9 @@
 // Start by creating a variable `message`
+var name = "Ali Haider";
+var nameLength = name.length;
+var greeting = "My name is ";
+var greeting2 = " and my name is ";
+var message = " characters long";
+var totalMessage = greeting + name + greeting2+ nameLength + message;
+console.log(totalMessage);
 
-console.log(message);
diff --git a/week-1/1-exercises/F-strings-methods/exercise2.js b/week-1/1-exercises/F-strings-methods/exercise2.js
index b4b4694..a0907ba 100644
--- a/week-1/1-exercises/F-strings-methods/exercise2.js
+++ b/week-1/1-exercises/F-strings-methods/exercise2.js
@@ -1,3 +1,8 @@
-const name = " Daniel  ";
-
-console.log(message);
+const name = "   Ali Haider    ";
+var orignalName = name.trim();
+var orignalNameLength = orignalName.length;
+var greeting = "My name is ";
+var greeting2 = " and my name is ";
+var message = " characters long";
+var totalMessage = greeting + orignalName + greeting2 + orignalNameLength+ message;
+console.log(totalMessage);
diff --git a/week-1/1-exercises/G-numbers/exercise.js b/week-1/1-exercises/G-numbers/exercise.js
index 49e7bc0..02a582c 100644
--- a/week-1/1-exercises/G-numbers/exercise.js
+++ b/week-1/1-exercises/G-numbers/exercise.js
@@ -1 +1,9 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+var numberofStudents = 15;
+var numberofMentors = 8;
+
+total = numberofStudents+ numberofMentors;
+
+console.log("Number of students: " + numberofStudents);
+console.log("Number of mentors: " + numberofMentors);
+console.log("Total number of students and mentors: "+ total);
\ No newline at end of file
diff --git a/week-1/1-exercises/I-floats/README.md b/week-1/1-exercises/I-floats/README.md
index e7c3999..56e2f96 100644
--- a/week-1/1-exercises/I-floats/README.md
+++ b/week-1/1-exercises/I-floats/README.md
@@ -20,4 +20,4 @@ var roughAge = Math.round(preciseAge); // 30
 ```
 Percentage students: 65%
 Percentage mentors: 35%
-```
+```
\ No newline at end of file
diff --git a/week-1/1-exercises/I-floats/exercise.js b/week-1/1-exercises/I-floats/exercise.js
index a5bbcd8..b62292f 100644
--- a/week-1/1-exercises/I-floats/exercise.js
+++ b/week-1/1-exercises/I-floats/exercise.js
@@ -1,2 +1,10 @@
 var numberOfStudents = 15;
 var numberOfMentors = 8;
+
+total = numberOfStudents + numberOfMentors;
+
+var percentageOfStudents = Math.round((numberOfStudents/total) * 100);
+var percentageOfMentors = Math.round((numberOfMentors / total) * 100);
+
+console.log("Percentage students: "+ percentageOfStudents+ "%");
+console.log("Percentage mentors: " + percentageOfMentors+ "%");
diff --git a/week-1/1-exercises/J-functions/exercise.js b/week-1/1-exercises/J-functions/exercise.js
index 0ae5850..033cc24 100644
--- a/week-1/1-exercises/J-functions/exercise.js
+++ b/week-1/1-exercises/J-functions/exercise.js
@@ -1,5 +1,7 @@
 function halve(number) {
   // complete the function here
+    var divide = number / 2;
+    return divide;         
 }
 
 var result = halve(12);
diff --git a/week-1/1-exercises/J-functions/exercise2.js b/week-1/1-exercises/J-functions/exercise2.js
index 82ef5e7..c38e3a0 100644
--- a/week-1/1-exercises/J-functions/exercise2.js
+++ b/week-1/1-exercises/J-functions/exercise2.js
@@ -1,5 +1,7 @@
 function triple(number) {
   // complete function here
+  var multiply = number * 3;
+  return multiply;
 }
 
 var result = triple(12);
diff --git a/week-1/1-exercises/K-functions-parameters/exercise.js b/week-1/1-exercises/K-functions-parameters/exercise.js
index 8d5db5e..ce0abea 100644
--- a/week-1/1-exercises/K-functions-parameters/exercise.js
+++ b/week-1/1-exercises/K-functions-parameters/exercise.js
@@ -1,6 +1,8 @@
 // Complete the function so that it takes input parameters
-function multiply() {
+function multiply(num1 , num2) {
   // Calculate the result of the function and return it
+    var result = num1 *  num2;
+    return result;
 }
 
 // Assign the result of calling the function the variable `result`
diff --git a/week-1/1-exercises/K-functions-parameters/exercise2.js b/week-1/1-exercises/K-functions-parameters/exercise2.js
index db7a890..395b6bd 100644
--- a/week-1/1-exercises/K-functions-parameters/exercise2.js
+++ b/week-1/1-exercises/K-functions-parameters/exercise2.js
@@ -1,5 +1,8 @@
 // Declare your function first
-
+function divide(num1,num2){
+    var result = num1/num2 ;
+    return result;
+}
 var result = divide(3, 4);
 
 console.log(result);
diff --git a/week-1/1-exercises/K-functions-parameters/exercise3.js b/week-1/1-exercises/K-functions-parameters/exercise3.js
index 537e9f4..96dd5a2 100644
--- a/week-1/1-exercises/K-functions-parameters/exercise3.js
+++ b/week-1/1-exercises/K-functions-parameters/exercise3.js
@@ -1,5 +1,8 @@
 // Write your function here
-
+function createGreeting(name){
+    var message = "Hello, my name is "+ name;
+    return message;
+}
 var greeting = createGreeting("Daniel");
 
 console.log(greeting);
diff --git a/week-1/1-exercises/K-functions-parameters/exercise4.js b/week-1/1-exercises/K-functions-parameters/exercise4.js
index 7ab4458..4394588 100644
--- a/week-1/1-exercises/K-functions-parameters/exercise4.js
+++ b/week-1/1-exercises/K-functions-parameters/exercise4.js
@@ -1,5 +1,8 @@
 // Declare your function first
-
+ function add( num1 , num2){
+     var addition = num1 + num2 ;
+     return addition;
+ }
 // Call the function and assign to a variable `sum`
-
+var sum = add(13,124);
 console.log(sum);
diff --git a/week-1/1-exercises/K-functions-parameters/exercise5.js b/week-1/1-exercises/K-functions-parameters/exercise5.js
index 7c5bcd6..8cb6d28 100644
--- a/week-1/1-exercises/K-functions-parameters/exercise5.js
+++ b/week-1/1-exercises/K-functions-parameters/exercise5.js
@@ -1,5 +1,11 @@
 // Declare your function here
-
+function createLongGreeting(name , age){
+    var message = "Hello, my name is ";
+    var message2 = " and I'm ";
+    var message3 = " years old";
+    var finalMessage = message + name + message2+ age + message3;
+    return finalMessage;
+}
 const greeting = createLongGreeting("Daniel", 30);
 
 console.log(greeting);
diff --git a/week-1/1-exercises/L-functions-nested/exercise.js b/week-1/1-exercises/L-functions-nested/exercise.js
index a5d3774..4988edb 100644
--- a/week-1/1-exercises/L-functions-nested/exercise.js
+++ b/week-1/1-exercises/L-functions-nested/exercise.js
@@ -1,5 +1,13 @@
-var mentor1 = "Daniel";
-var mentor2 = "Irina";
-var mentor3 = "Mimi";
-var mentor4 = "Rob";
-var mentor5 = "Yohannes";
+function Percentage(numberOfStudents, numberOfMentors){
+   var total = numberOfStudents + numberOfMentors;
+    var percentageOfStudents = Math.round((numberOfStudents / total) * 100);
+    var percentageOfMentors = Math.round((numberOfMentors / total) * 100);
+    return percentageOfMentors,percentageOfStudents;
+}
+function message(){
+    console.log("Percentage students: " + Percentage(15,8) + "%");
+    console.log("Percentage mentors: " + Percentage(8,15) + "%");
+    
+}
+
+message();
\ No newline at end of file
diff --git a/week-1/1-exercises/L-functions-nested/exercise2.js b/week-1/1-exercises/L-functions-nested/exercise2.js
new file mode 100644
index 0000000..62788f1
--- /dev/null
+++ b/week-1/1-exercises/L-functions-nested/exercise2.js
@@ -0,0 +1,23 @@
+var mentor1 = "Daniel";
+var mentor2 = "Irina";
+var mentor3 = "Mimi";
+var mentor4 = "Rob";
+var mentor5 = "Yohannes";
+
+function captilize(str){
+   
+    str.toUpperCase();
+    return str.toUpperCase();;
+}
+
+function greetings(){
+   // captilize(mentor1, mentor2, mentor3, mentor4, mentor5);
+    var msg = "HELLO ";
+    console.log( msg + captilize(mentor1));
+    console.log(msg + captilize(mentor2));
+    console.log(msg + captilize(mentor3));
+    console.log(msg + captilize(mentor4));
+    console.log(msg + captilize(mentor5));
+
+}
+greetings();
diff --git a/week-1/2-mandatory/1-syntax-errors.js b/week-1/2-mandatory/1-syntax-errors.js
index 6910f28..8f52920 100644
--- a/week-1/2-mandatory/1-syntax-errors.js
+++ b/week-1/2-mandatory/1-syntax-errors.js
@@ -2,18 +2,22 @@
 
 // There are syntax errors in this code - can you fix it to pass the tests?
 
-function addNumbers(a b c) {
+function addNumbers(a ,b, c) {
     return a + b + c;
 }
 
-function introduceMe(name, age)
-return "Hello, my name is " + name "and I am " age + "years old";
-
+function introduceMe(name, age){
+return "Hello, my name is "+name+ " and I am "+age+ " years old";
+}
 function getAddition(a, b) {
-    total = a ++ b
+    total = a + b;
 
     // Use string interpolation here
-    return "The total is %{total}"
+    return `The total is ${total}`;
+}
+function getRemainder (a,b){
+    
+    return "The remainder is "+ a % b;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/week-1/2-mandatory/2-logic-error.js b/week-1/2-mandatory/2-logic-error.js
index 1e0a9d4..f64f61a 100644
--- a/week-1/2-mandatory/2-logic-error.js
+++ b/week-1/2-mandatory/2-logic-error.js
@@ -1,16 +1,16 @@
 // The syntax for this function is valid but it has an error, find it and fix it.
 
 function trimWord(word) {
-  return wordtrim();
+  return word.trim();
 }
 
 function getWordLength(word) {
-  return "word".length()
+  return word.length;
 }
 
 function multiply(a, b, c) {
-  a * b * c;
-  return;
+  
+  return a * b * c;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== 
diff --git a/week-1/2-mandatory/3-function-output.js b/week-1/2-mandatory/3-function-output.js
index bbb88a2..7e2a11b 100644
--- a/week-1/2-mandatory/3-function-output.js
+++ b/week-1/2-mandatory/3-function-output.js
@@ -1,9 +1,14 @@
 // Add comments to explain what this function does. You're meant to use Google!
+// This function generate a random number between a range of 0 to 10.
+// Math.random() generate a floating point number between a range of 0 to 1. 
+// In which 0 is inclusive and 1 is exclusive.
 function getNumber() {
   return Math.random() * 10;
 }
 
 // Add comments to explain what this function does. You're meant to use Google!
+// concat() method is used to combine or join two strings.
+// In this function w2 is added to the infront of w1.
 function s(w1, w2) {
   return w1.concat(w2);
 }
@@ -11,6 +16,7 @@ function s(w1, w2) {
 function concatenate(firstWord, secondWord, thirdWord) {
   // Write the body of this function to concatenate three words together
   // Look at the test case below to understand what to expect in return
+  return firstWord+" "+secondWord+" "+thirdWord
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== 
diff --git a/week-1/2-mandatory/4-tax.js b/week-1/2-mandatory/4-tax.js
index 6b84208..829a61a 100644
--- a/week-1/2-mandatory/4-tax.js
+++ b/week-1/2-mandatory/4-tax.js
@@ -5,7 +5,9 @@
   Sales tax is 20% of the price of the product
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(price) {
+  return (price/100*20) + price;
+}
 
 /*
   CURRENCY FORMATTING
@@ -17,7 +19,9 @@ function calculateSalesTax() {}
   Remember that the prices must include the sales tax (hint: you already wrote a function for this!)
 */
 
-function formatCurrency() {}
+function formatCurrency(price) {
+  return "£"+calculateSalesTax(price).toFixed(2);
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.