diff --git a/aps.js b/aps.js
new file mode 100644
index 00000000..024aa4f5
--- /dev/null
+++ b/aps.js
@@ -0,0 +1,56 @@
+
+
+
+            function fetchData1(callback) {
+                fetch(('https://fakestoreapi.com/products?limit=5'))
+                  .then(response => response.json())
+                  .then(data => callback(null, data))
+                  .catch(error => callback(error));
+              }
+
+
+              
+            function fetchData2(callback) {
+                fetch(('https://fakestoreapi.com/products?limit=6'))
+                  .then(response => response.json())
+                  .then(data => callback(null, data))
+                  .catch(error => callback(error));
+              }
+
+
+              
+            function fetchData3(callback) {
+                fetch(('https://fakestoreapi.com/products?limit=7'))
+                  .then(response => response.json())
+                  .then(data => callback(null, data))
+                  .catch(error => callback(error));
+              }
+              
+
+
+
+
+
+
+
+
+
+
+              fetchData1(() => { 
+
+                fetchData2(()=> {
+
+                  fetchData3( ()=> {
+
+                     console.log("all done")
+                  })
+
+                })
+             })
+              
+              
+
+
+
+
+
diff --git a/assign.js b/assign.js
new file mode 100644
index 00000000..4b38236b
--- /dev/null
+++ b/assign.js
@@ -0,0 +1,175 @@
+// Q1 Create variables of different types
+
+// var stringVariable = "Hello";
+// var numberVariable = 42;
+// var booleanVariable = true;
+
+// Modify variables
+
+// stringVariable += " World";
+// numberVariable *= 2;
+// booleanVariable = !booleanVariable;
+
+// Output the modified variables
+
+// console.log("Modified String Variable:", stringVariable);
+// console.log("Modified Number Variable:", numberVariable);
+// console.log("Modified Boolean Variable:", booleanVariable);
+
+
+//Q2  make an object with let and two object with constant . one of the constant object 
+// should accept new data but not modification and the other should not accept any change.
+
+// Object using let
+let mutableObject = {
+    name: "John",
+    age: 30
+};
+
+// Objects using const
+const readOnlyObject = {
+    city: "New York",
+    country: "USA"
+};
+
+const immutableObject = Object.freeze({
+    color: "blue",
+    size: "medium"
+});
+
+// Try modifying the let object
+mutableObject.age = 35;
+mutableObject.gender = "Male"; // Adding new data is allowed
+
+// Try modifying the read-only object
+// readOnlyObject.city = "Los Angeles"; // This will throw an error
+readOnlyObject.population = 8000000; // Adding new data is allowed
+
+// Try modifying the immutable object
+// immutableObject.color = "red"; // This will throw an error
+// immutableObject.shape = "square"; // This will throw an error
+
+
+//same task for array 
+
+// Array using let
+let mutableArray = [1, 2, 3, 4, 5];
+
+// Arrays using const
+const readOnlyArray = [6, 7, 8, 9, 10];
+
+const immutableArray = Object.freeze([11, 12, 13, 14, 15]);
+
+// Try modifying the let array
+mutableArray.push(6); // Adding new element is allowed
+mutableArray[0] = 0; // Modifying existing element is allowed
+
+// Try modifying the read-only array
+// readOnlyArray[0] = 5; // This will throw an error
+readOnlyArray.push(11); // Adding new element is allowed
+
+// Try modifying the immutable array
+// immutableArray[0] = 10; // This will throw an error
+// immutableArray.push(16); // This will throw an error
+
+
+// // Function Declaration
+function greet3(name) {
+    return `Hello, ${name}!`;
+}
+
+// Calling the function
+console.log(greet3("Alice"));  // Output: Hello, Alice!
+
+
+
+// Function Expression (Anonymous)
+const greet4 = function(name) {
+    return `Hello, ${name}!`;
+};
+
+// Calling the function
+console.log(greet4("Bob"));  // Output: Hello, Bob!
+
+
+// Arrow Function
+const greet5= (name) => {
+    return `Hello, ${name}!`;
+};
+
+// Arrow Function with implicit return (single expression)
+const greetShort = name => `Hello, ${name}!`;
+
+// Calling the functions
+console.log(greet5("Charlie"));  // Output: Hello, Charlie!
+console.log(greetShort("Dave"));  // Output: Hello, Dave!
+
+
+
+// Immediately Invoked Function Expression (IIFE)
+(function() {
+    console.log("This function runs immediately!");
+})();
+
+// IIFE with parameters
+(function(name) {
+    console.log(`Hello, ${name}!`);
+})("Eve");
+
+
+// Generator Function
+function* generateSequence() {
+    yield 1;
+    yield 2;
+    yield 3;
+}
+
+// Using the generator
+const generator = generateSequence();
+console.log(generator.next().value);  // Output: 1
+console.log(generator.next().value);  // Output: 2
+console.log(generator.next().value);  // Output: 3
+
+
+
+// Async Function
+async function fetchData() {
+    const response = await fetch('https://api.example.com/data');
+    const data = await response.json();
+    return data;
+}
+
+// Using the async function
+fetchData().then(data => console.log(data));
+
+
+
+// Method Definition
+const person = {
+    name: 'Alice',
+    greet1() {
+        return `Hello, my name is ${this.name}`;
+    }
+};
+
+// Calling the method
+console.log(person.greet1());  // Output: Hello, my name is Alice
+
+
+
+
+// Constructor Function
+function Person(name, age) {
+    this.name = name;
+    this.age = age;
+}
+
+Person.prototype.greet2 = function() {
+    return `Hello, my name is ${this.name} and I am ${this.age} years old`;
+};
+
+// Creating an object
+const person1 = new Person('Bob', 30);
+
+// Calling a method on the object
+console.log(person1.greet2());  // Output: Hello, my name is Bob and I am 30 years old
diff --git a/fetch.js b/fetch.js
new file mode 100644
index 00000000..16158553
--- /dev/null
+++ b/fetch.js
@@ -0,0 +1,16 @@
+
+
+
+
+async function fetchData() {
+  try {
+    const response = await fetch(('https://fakestoreapi.com/products?limit=5'));
+    const data = await response.json();
+    console.log(data);
+  } catch (error) {
+    console.error(error);
+  }
+}
+
+fetchData();
+
diff --git a/promise1.js b/promise1.js
new file mode 100644
index 00000000..da55b149
--- /dev/null
+++ b/promise1.js
@@ -0,0 +1,16 @@
+// fetch data with 
+
+
+function fetchData() {
+    return new Promise((resolve, reject) => {
+      fetch(('https://fakestoreapi.com/products?limit=5'))
+        .then(response => response.json())
+        .then(data => resolve(data))
+        .catch(error => reject(error));
+    });
+  }
+  
+  fetchData()
+    .then(data => console.log(data))
+    .catch(error => console.error(error));
+  
\ No newline at end of file