diff --git a/03 - Chai aur Javascript/13 - Prototypes/04_prototype_methods_and_properties.js b/03 - Chai aur Javascript/13 - Prototypes/04_prototype_methods_and_properties.js
new file mode 100644
index 0000000..c5f9f80
--- /dev/null
+++ b/03 - Chai aur Javascript/13 - Prototypes/04_prototype_methods_and_properties.js	
@@ -0,0 +1,24 @@
+// Prototype Methods and Properties
+
+function Car(brand, model){
+    this.brand = brand
+    this.model = model
+}
+
+// Create Prototype Method
+Car.prototype.start = function(){
+    console.log(`${this.brand} ${this.model} starts.`);
+}
+
+// Create Prototype Property
+Car.prototype.year = 2024
+
+
+// Object
+const myCar = new Car("Mahindra", "Scorpio-N")
+
+// Call method
+myCar.start() // Output: Mahindra Scorpio-N starts
+
+// Call property
+console.log(myCar.year) // Output : 2024
\ No newline at end of file
diff --git a/03 - Chai aur Javascript/13 - Prototypes/05_modifying_prototypes.js b/03 - Chai aur Javascript/13 - Prototypes/05_modifying_prototypes.js
new file mode 100644
index 0000000..b7d2bd8
--- /dev/null
+++ b/03 - Chai aur Javascript/13 - Prototypes/05_modifying_prototypes.js	
@@ -0,0 +1,21 @@
+// Modifying Prototypes
+
+function Vehicle(type){
+    this.type = type
+}
+
+// Prototype method
+Vehicle.prototype.describe = function(){
+    console.log(`This is a ${this.type}`);
+}
+
+// Object
+const bike = new Vehicle('bike')
+bike.describe() // This is a bike
+
+
+Vehicle.prototype.describe = function(){
+    console.log(`The type of the Vehicle is ${this.type}`);
+}
+
+bike.describe() // The type of the Vehicle is bike
\ No newline at end of file
diff --git a/03 - Chai aur Javascript/13 - Prototypes/06_setPrototypeOf.js b/03 - Chai aur Javascript/13 - Prototypes/06_setPrototypeOf.js
new file mode 100644
index 0000000..1f7898a
--- /dev/null
+++ b/03 - Chai aur Javascript/13 - Prototypes/06_setPrototypeOf.js	
@@ -0,0 +1,23 @@
+// setPrototypeOf
+
+const animal = {
+    speak(){
+        console.log("Animal Speaks.");
+    }
+}
+
+const dog = {
+    bark() {
+        console.log("Dog barks.");
+    }
+}
+
+Object.setPrototypeOf(dog, animal)
+
+dog.speak() // Output: Animal speaks (inherited from prototype)
+
+dog.bark() // Output: Dog barks
+
+animal.speak() // Output : Animal speaks
+
+animal.bark() // Error: animal.bark is not a function
diff --git a/03 - Chai aur Javascript/13 - Prototypes/07_getPrototypeOf.js b/03 - Chai aur Javascript/13 - Prototypes/07_getPrototypeOf.js
new file mode 100644
index 0000000..2c8caf0
--- /dev/null
+++ b/03 - Chai aur Javascript/13 - Prototypes/07_getPrototypeOf.js	
@@ -0,0 +1,11 @@
+// Object.getPrototypeOf.js
+
+const animal = {
+    speak(){
+        console.log("Animal speaks");
+    }
+}
+
+const dog = Object.create(animal)
+
+console.log(Object.getPrototypeOf(dog)); // Output {speak : [Function speak]}
\ No newline at end of file
diff --git a/03 - Chai aur Javascript/13 - Prototypes/08_hasOwnProperty.js b/03 - Chai aur Javascript/13 - Prototypes/08_hasOwnProperty.js
new file mode 100644
index 0000000..8c4842e
--- /dev/null
+++ b/03 - Chai aur Javascript/13 - Prototypes/08_hasOwnProperty.js	
@@ -0,0 +1,20 @@
+// Object.hasOwnProperty()
+
+const animal = {
+    speak(){
+        console.log("Animal speaks");
+    }
+}
+
+const dog = Object.create(animal)
+
+
+dog.bark = function(){
+        console.log("Dog barks");
+}
+
+dog.bark()
+dog.speak()
+
+console.log(dog.hasOwnProperty('bark')); // true (own property)
+console.log(dog.hasOwnProperty('speak')); // false (inherited property)
\ No newline at end of file
diff --git a/03 - Chai aur Javascript/13 - Prototypes/09_object_composition.js b/03 - Chai aur Javascript/13 - Prototypes/09_object_composition.js
new file mode 100644
index 0000000..f9ddeab
--- /dev/null
+++ b/03 - Chai aur Javascript/13 - Prototypes/09_object_composition.js	
@@ -0,0 +1,20 @@
+// Object Composition
+
+const vehicle = {
+    start(){
+        console.log("Vehicle started");
+    }
+}
+
+// Object.assign({}, vehicle, {drive(){}})
+// Pehla argument {} ek empty object hai, jis mein saari properties copy hogi.
+// Dusra argument vehicle hai, jisse start method copy hoga
+// Teesra argument ek naya object hai jisme drive method define kiya jaega.
+const car = Object.assign({}, vehicle, {
+    drive(){
+        console.log("Car is Driving");
+    }
+})
+
+car.start() // Output: Vehicle started
+car.drive() // Output: Car is driving
\ No newline at end of file