diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..9abcdf9
Binary files /dev/null and b/.DS_Store differ
diff --git a/1. objects/1.md b/1. objects/1.md
index 5110277..8fb3fc7 100644
--- a/1. objects/1.md	
+++ b/1. objects/1.md	
@@ -1,73 +1,142 @@
-1. Pick a penguin from Wikipedia's List of Fictional Penguins (https://en.wikipedia.org/wiki/List_of_fictional_penguins) and create an object named `myPenguin` with properties that represent the information listed in each column on that Wikipedia page (for example: the character's name, origin, and author).
+  1. Pick a penguin from Wikipedia's List of Fictional Penguins (https://en.wikipedia.org/wiki/List_of_fictional_penguins) and create an object named `myPenguin` with properties that represent the information listed in each column on that Wikipedia page (for example: the character's name, origin, and author).
 
 ```js
 // your code goes here
+
+var myPenguin = {
+        name : "Patrick",
+        canFly : false,
+        hello : function sayHello(){
+            return (`Hello, I'm a penguin and my name is ${myPenguin.penguin.name}!`);
+            },
+        chirp : function chrip(){
+           return  "CHIRP CHIRP! Is this what penguins sound like?";
+             },
+        fly : function fly(){
+            if (canFly == true) {
+                consloe.log("I can fly!");
+            } else {
+                console.log("No flying for me!");
+            }
+        },     
+    1 : { "Literature": 
+            {
+                1.1 : "comics"
+            }
+        },
+    2 : "Theatre",
+    3 : {"in media":
+            { 
+                3.1 : "Animations",
+                3.2 : "video games",
+                3.3 : " Other media (toys, mascots, logos, etc.)"
+            }  
+        },
+    4 : "See also",
+    5 : "References",
+};
+for(let key in myPenguin){
+    console.log(Object.keys(myPenguin.penguin);
+}
+
+
+
+
 ```
 
 2. Use console.log() to print the penguin's name to the console as part of a welcome message, like "Hello, I'm a penguin and my name is [NAME HERE]!"
 
 ```js
 // your code goes here
+console.log(`Hello, I'm a penguin and my name is ${myPenguin.name}!`)
 ```
 
 3. Write another line of code that adds a new property to your penguin called canFly and set it to false.
 
 ```js
 // your code goes here
+ canFly : false
+console.log(myPenguin["penguin"]["canFly"])
 ```
 
 4. Add a method to your penguin called chirp that prints to the console: "CHIRP CHIRP! Is this what penguins sound like?"
 
 ```js
 // your code goes here
+chirp : chrip(){
+           return  "CHIRP CHIRP! Is this what penguins sound like?"
+             } 
+console.log(myPenguin.penguin.chrip)             
 ```
 
 6. Next, call your penguin's sayHello() method and make sure that it works!
 
 ```js
 // your code goes here
+hello : sayHello(){
+            return `Hello, I'm a penguin and my name is ${this.name}!`
+            },
 ```
 
 7. Without modifying any of your previous code, change the penguin's name to "Penguin McPenguinFace" and then call your penguin's sayHello() function one more time to make sure it still works.
 
 ```js
 // your code goes here
+myPenguin["penguin"]["name" = "Penguin McPenguinFace"]
 ```
 
 8. Write another method called fly, and inside that method, use an if / else statement to print "I can fly!" to the console if your penguin's canFly property is true, or "No flying for me!" if its canFly property is false.
 
 ```js
 // your code goes here
+fly : function fly(){
+            if (canFly == true) {
+                consloe.log("I can fly!");
+            } else {
+                console.log("No flying for me!");
+            }
+        }     
+
 ```
 
 9. Call your penguin's fly() method and make sure it works!
 
 ```js
 // your code goes here
+myPenguin["penguin"]["fly"]
 ```
 
 10. Change the canFly property to true -- again, without modifying any of your previous code!
 
 ```js
 // your code goes here
+myPenguin["penguin"]["canFly" = true ]
 ```
 
 11. Now call your penguin's fly() method again and make sure it works as expected!
 
 ```js
 // your code goes here
+myPenguin["penguin"]["fly"]
 ```
 
 12. Write a for ... in loop to print each key to the console. (Hint: See this page for an example of this special type of loop.)
 
 ```js
 // your code goes here
+for(let key in myPenguin){
+    console.log(key);
+}
 ```
 
 13. Write another for ... in loop to print the value of each key to the console. (Hint: You'll need to use bracket notation to access the values this way, instead of dot notation!)
 
 ```js
 // your code goes here
+for(let key in myPenguin){
+    console.log(myPenguin.key);
+
+}
 ```
 
 ## Exercise 2
@@ -84,6 +153,13 @@
 
 ```js
 // your code goes here
+let favouriteRecepie = {
+    title: Mole,
+    serves: 2,
+    ingrediants: ["cinnamon","cumin","cocoa"]
+}
+
+
 ```
 
  15. Keep track of which books you read and which books you want to read!
@@ -94,4 +170,26 @@
 
  ```js
 // your code goes here
+let books = [
+   {
+       title : "Eclipse",
+       author : "Stephenie Meyer",
+       alreadyRead : true,
+   },
+   {
+       title : "Harry Potter",
+       author : "J.K Rowling",
+       alreadyRead : false,
+   }
+];
+
+for (let book in books) {
+   console.log(`${books[book]["title"]} by ${books[book]["author"]}`);
+   if (books[book]["alreadyRead"]) {
+       console.log(`You already read ${books[book]["title"]} by ${books[book]["author"]}`);
+   }
+   else {
+       console.log(`You still need to read ${books[book]["title"]} by ${books[book]["author"]}`);   
+   }
+}
 ```
diff --git a/1. objects/2.js b/1. objects/2.js
index d5967e4..7c23edc 100644
--- a/1. objects/2.js	
+++ b/1. objects/2.js	
@@ -1,23 +1,56 @@
 // Using the different way of accessing and assigning a value to the object using `.` or `[]`
-
+var obj = {
+    name:"sunny",
+    age:21,
+    qualification:"B.tech"
+}
+console.log(obj.name);
+console.log(obj["age"]);
 // 1. Define a variable named `user` and assign a blank object to it.
+var user = {};
 
 // 2. Add a key of `user name` and a value of `Black Panther` to that object.
+var user = {
+    userName:"Black Panther",
+    10:batch,
+    42:`The answer to the meaning of life 🧸`
+}
 
 // 3. Using `console.log` log the value of `user name` key from the user object.
-
+console.log(user.userName);
 // 4. Add a key of the value of variable `batch` in the object with the value of 10.
 var batch = "myBatch";
+var user = {
+    userName:"Black Panther",
+    10:batch,
+    42:`The answer to the meaning of life 🧸`
+}
 
 // 5. Using the alert function alert the value of the key added above.
+alert(user[10]);
 
 // 6. Add a key of `42` to the object with a value of `The answer to the meaning of life 🧸`.
-
+var batch = "myBatch";
+var user = {
+    userName:"Black Panther",
+    10:batch,
+    42:`The answer to the meaning of life 🧸`
+}
 // 7. Using the function console.log log the value of the key `42`.
-
+console.log(user[42]);
 // 8. Add a key in your object with the value of the variable `city`. The value of the key should be `true`.
 var city = prompt("Enter the city name you visited las time.");
+var batch = "myBatch";
+var user = {
+    userName:"Black Panther",
+    10:batch,
+    42:`The answer to the meaning of life 🧸`,
+    true:city,
+    let :"you",
+    var :"me"
+}
 
 // 9. Uisng console.log log the value of the key defined above.
-
+console.log(user[true])
 // 10. Can you define a key of `let or var` in any object? Reason.
+yes we can take var or let as key because objects just understand key value pairs. but it will target all var inside the obj.
\ No newline at end of file
diff --git a/2. array/1.md b/2. array/1.md
index 1a23aee..123f54d 100644
--- a/2. array/1.md	
+++ b/2. array/1.md	
@@ -2,70 +2,97 @@
 
 ```js
 // your code goes here
+let colors =["red","blue","green","cyan","magenta"]
 ```
 
 2. Access the first color in the array and print it to the console using console.log()
 
 ```js
 // your code goes here
+console.log(colors[0])
 ```
 
 3.Now do the same with the third color in the list. (Remember that array indexes start at 0, not at 1!)
 
 ```js
 // your code goes here
+console.log(colors[2])
 ```
 
 4.Write one line of code that changes the value of the last color in the list to "ultraviolet" (overwriting the previous value).
 
 ```js
 // your code goes here
+colors[4] = "ultraviolet"
+console.log(colors[4])
 ```
 
 5. Create a new variable called fourthColor and set it equal to the fourth color in the list.
 
 ```js
 // your code goes here
+let fourthColor = colors[3];
+console.log(forthColor);
 ```
 
 6.Add another color to the end of the list.
 
 ```js
 // your code goes here
+colors.push("green")
+console.log(colors)
 ```
 
 7.Add another color to the beginning of the list.
 
 ```js
 // your code goes here
+colors.unshift("black")
+console.log(colors)
 ```
 
 8. Print the length of the array to the console with console.log()
 
 ```js
 // your code goes here
+console.log(colors.length)
 ```
 
 9.Remove the last color from the end of list, and then print the length of the array to the console one more time.
 
 ```js
 // your code goes here
+colors.pop()
+console.log(colors)
 ```
 
 10.Write a for loop to iterate through every color in the array and print each color's value to the console.
 
 ```js
 // your code goes here
+for (let values in colors){
+    console.log(colors[values])
+}
 ```
 
 11.Copying from that loop you just wrote, modify it to print every color's value and every color's index in this format: 3, purple or 0, blue etc.
 
 ```js
 // your code goes here
+for (values = 0; values < colors.length ; values++){
+    console.log(`the index of ${colors[values]}, is ${[values]}`);
+}
+OR //
+for (let values in colors){
+    console.log(`the index of ${colors[values]}, is ${values}`);
+}
 ```
 
 12.Create a variable named lastColor that will always point to the last element of the colors array, no matter how many colors are in the list. (Hint: make use of the array's length property for this!)
 
 ```js
 // your code goes here
+let lastColor = colors.(length-1);
+
+
 ```
\ No newline at end of file
diff --git a/3. copy-vs-reference/index.js b/3. copy-vs-reference/index.js
index f4efbd0..2b71295 100644
--- a/3. copy-vs-reference/index.js	
+++ b/3. copy-vs-reference/index.js	
@@ -4,6 +4,10 @@ var x = 10;
 var y = "abc";
 var a = x;
 var b = y;
+//value of x = 10
+//value of y = "abc"
+//value of a = 10
+//value of b = "abc"
 
 // Value of x, y, a, b
 var x = 10;
@@ -12,20 +16,37 @@ var a = x;
 var b = y;
 a = 5;
 b = "def";
+//value of x = 10
+//value of y = "abc"
+//value of a = 10 initially
+//value of b = "abc" initially
+//value of a = 5
+//value of b = "def"
 
 // Value of arr & arrCopy
 var arr = [1];
 var arrCopy = arr;
 arr.push(2);
 
+//value of arr = [1] initially
+//value of arrCopy = [1] initially
+// value of arr = [1,2]
+//value of arrCopy = [1,2]
+
 // Value of obj
 var obj = { name: "ryan" };
 obj = { surname: "florance" };
 
+//value of obj = { name: "ryan" }; initially
+//value of obj = { surname: "florance" };
+
 // What's the output.
 var arr = ["Hi"];
 var arr2 = arr;
 console.log(arr === arr2);
+// value of arr = ["Hi"];
+// value of arr2 = ["Hi"];
+console.log(arr === arr2)// true 
 
 // What's the output.
 var arr1 = ["Hi!"];
@@ -33,8 +54,15 @@ var arr2 = ["Hi!"];
 console.log(arr1 === arr2);
 console.log(arr == arr2);
 
+// value of arr1 = ["Hi!"];
+// value of arr2 = ["Hi!"];
+console.log(arr1 === arr2);// false
+console.log(arr == arr2); // false
+
 //What's the output
 console.log([10] === [10]);
+// false 
+
 
 // What's the output?
 
@@ -47,13 +75,14 @@ function personDetails(person) {
 
   return person;
 }
+
 var personObj1 = {
   name: "Alex",
   age: 30
 };
 var personObj2 = personDetails(personObj1);
-console.log(personObj1); // -> ?
-console.log(personObj2); // -> ?
+console.log(personObj1); // -> {name: "Alex",age: 30}
+console.log(personObj2); // -> {name: "John",age: 50}
 
 // Guess the output
 var oldArray = [];
@@ -61,20 +90,21 @@ var object = {};
 object.newArray = oldArray;
 oldArray.push(10);
 console.log(object.newArray === oldArray);
+// true
 
 // Guess the output
 var a = 5;
 var b = a;
 a = 10;
-console.log(a);
-console.log(b);
+console.log(a); //10
+console.log(b); //5
 
 // What's the output?
 var a = {};
 var b = a;
 a.a = 1;
-console.log(a);
-console.log(b);
+console.log(a); //{a:1}
+console.log(b); //{a:1}
 
 // What's the output.
 var a = [];
@@ -82,7 +112,7 @@ var b = a;
 a.push(1);
 console.log(a); // [1]
 console.log(b); // [1]
-console.log(a === b);
+console.log(a === b); //true
 
 // Clone the object person in clone
 var person = {
@@ -94,4 +124,6 @@ var person = {
   }
 };
 
-var clone = {};
+var clone = {...person}; 
+//OR
+clone = Object.assign(person);
\ No newline at end of file
diff --git a/4. array-and-objects/.DS_Store b/4. array-and-objects/.DS_Store
new file mode 100644
index 0000000..9869cc1
Binary files /dev/null and b/4. array-and-objects/.DS_Store differ
diff --git a/4. array-and-objects/01/main.js b/4. array-and-objects/01/main.js
index e69de29..c34c817 100644
--- a/4. array-and-objects/01/main.js	
+++ b/4. array-and-objects/01/main.js	
@@ -0,0 +1,46 @@
+
+var foods =["pizza","burger","pasta","takos"];
+var myPenguin = {
+        name : "Patrick",
+        canFly : false,
+        sayHello : function sayHello(){
+            return (`Hello, I'm a penguin and my name is ${myPenguin.penguin.name}!`);
+            },
+        chirp : function chrip(){
+           return  "CHIRP CHIRP! Is this what penguins sound like?";
+             },
+        fly : function fly(){
+            if (canFly == true) {
+                consloe.log("I can fly!");
+            } else {
+                console.log("No flying for me!");
+            }
+        } ,
+        favouriteFoods: foods,
+        firstFavFood : foods[1],
+        lastFavFood : favouriteFoods[favouriteFoods.length - 1],
+    1 : { "Literature": 
+            {
+                1.1 : "comics"
+            }
+        },
+    2 : "Theatre",
+    3 : {"in media":
+            { 
+                3.1 : "Animations",
+                3.2 : "video games",
+                3.3 : " Other media (toys, mascots, logos, etc.)"
+            }  
+        },
+    4 : "See also",
+    5 : "References",
+};
+console.log(myPenguin["favouriteFoods"][1]);
+ myPenguin["favouriteFoods"].push("takos");
+console.log(myPenguin["favouriteFoods"].length);
+
+for (i = 0; i<(myPenguin["favouriteFoods"].length);i++){
+    console.log(myPenguin["favouriteFoods"][i]);
+    }
+
+
diff --git a/4. array-and-objects/02/main.js b/4. array-and-objects/02/main.js
index e69de29..b5baa6b 100644
--- a/4. array-and-objects/02/main.js	
+++ b/4. array-and-objects/02/main.js	
@@ -0,0 +1,87 @@
+var gunter = {
+    name: "Gunter",
+    origin: "Adventure Time",
+    canFly: false,
+    sayHello: function () {
+      console.log("QUACK!!!");
+    }
+  };
+  
+  var ramon = {
+    name: "Ramón",
+    origin: "Happy Feet",
+    canFly: true,
+    sayHello: function () {
+      console.log("Estoy encantado de conocerle.");
+    }
+  };
+  
+  var fred = {
+    name: "Fred",
+    origin: "Sitting Ducks",
+    canFly: false,
+    sayHello: function () {
+      console.log("Hi there!");
+    }
+  };
+
+  var penguins = [gunter , ramon , fred];
+
+var foods =["pizza","burger","pasta","takos"];
+var myPenguin = {
+        name : "Patrick",
+        canFly : false,
+        sayHello : function (){
+            return (`Hello, I'm a penguin and my name is ${myPenguin.penguin.name}!`);
+            },
+        chirp : function chrip(){
+           return  "CHIRP CHIRP! Is this what penguins sound like?";
+             },
+        fly : function fly(){
+            if (canFly == true) {
+                consloe.log("I can fly!");
+            } else {
+                console.log("No flying for me!");
+            }
+        } ,
+        favouriteFoods: foods,
+        firstFavFood : favouriteFoods[1],
+        lastFavFood : favouriteFoods[favouriteFoods.length - 1],
+    1 : { "Literature": 
+            {
+                1.1 : "comics"
+            }
+        },
+    2 : "Theatre",
+    3 : {"in media":
+            { 
+                3.1 : "Animations",
+                3.2 : "video games",
+                3.3 : " Other media (toys, mascots, logos, etc.)"
+            }  
+        },
+    4 : "See also",
+    5 : "References",
+};
+  console.log(penguins[0]);
+  var secondPenguin = penguins[1];
+  console.log(penguins[2]);
+  penguins.push(myPenguin);
+  console.log(penguins.length);
+  gunter.canFly = true;
+  gunter.sayHello();
+  for (let penguin in penguins){
+      console.log (penguins[penguin]);
+  }
+  for (var penguin in penguins){
+      console.log(penguins[penguin].sayHello());
+  }
+  for (var penguin in penguins){
+      console.log(penguins[penguin].noOfFeet = 2);
+  }
+  for (var penguin in penguins){
+      if (penguins[penguin].canFly === true) {
+          console.log(`penguin ${penguins[penguin].name} can Fly`);
+      }
+  }
+  
\ No newline at end of file
diff --git a/4. array-and-objects/03/main.js b/4. array-and-objects/03/main.js
index e69de29..3a67c4c 100644
--- a/4. array-and-objects/03/main.js	
+++ b/4. array-and-objects/03/main.js	
@@ -0,0 +1,110 @@
+var gunter = {
+    name: "Gunter",
+    origin: "Adventure Time",
+    canFly: false,
+    sayHello: function () {
+      console.log("QUACK!!!");
+    },
+    favouriteFoods: foods,
+    firstFavFood : favouriteFoods[1],
+    lastFavFood : favouriteFoods[favouriteFoods.length - 1],
+    outFit :outfit ,
+  };
+  
+  var ramon = {
+    name: "Ramón",
+    origin: "Happy Feet",
+    canFly: true,
+    sayHello: function () {
+      console.log("Estoy encantado de conocerle.");
+    },
+    favouriteFoods: foods,
+    firstFavFood : favouriteFoods[1],
+    lastFavFood : favouriteFoods[favouriteFoods.length - 1],
+    outFit :outfit ,
+  };
+  
+  var fred = {
+    name: "Fred",
+    origin: "Sitting Ducks",
+    canFly: false,
+    sayHello: function () {
+      console.log("Hi there!");
+    },
+    favouriteFoods: foods,
+    firstFavFood : foods[1],
+    lastFavFood : foods[foods.length - 1],
+    outFit :outfit ,
+  };
+
+var myPenguin = {
+        name : "Patrick",
+        canFly : false,
+        sayHello : function (){
+            return (`Hello, I'm a penguin and my name is ${myPenguin.penguin.name}!`);
+            },
+        chirp : function chrip(){
+           return  "CHIRP CHIRP! Is this what penguins sound like?";
+             },
+        fly : function fly(){
+            if (canFly == true) {
+                consloe.log("I can fly!");
+            } else {
+                console.log("No flying for me!");
+            }
+        } ,
+        favouriteFoods: foods,
+        firstFavFood : foods[1],
+        lastFavFood : foods[foods.length - 1],
+        outFit :outfit ,
+
+    1 : { "Literature": 
+            {
+                1.1 : "comics"
+            }
+        },
+    2 : "Theatre",
+    3 : {"in media":
+            { 
+                3.1 : "Animations",
+                3.2 : "video games",
+                3.3 : " Other media (toys, mascots, logos, etc.)"
+            }  
+        },
+    4 : "See also",
+    5 : "References",
+};
+var outfit = {
+    hat : "baseball cap",
+    shirt : "Hawaiian shirt",
+    pants : "cargo shorts",
+    shoes : "flip-flops"
+}
+for (var penguin in penguins) {
+    penguin["outFit"] = outfit;
+}
+var penguins = [gunter , ramon , fred, myPenguin];
+var foods =["pizza","burger","pasta","takos"];
+for (var penguin in penguins){
+    penguinHatType = penguin["outFit"].hat;
+}
+for (var penguin in penguins) {
+    penguin["outFit"].accessory = "pocket watch";
+}
+for (var penguin in  penguins) {
+    penguin["outfit"].hat = "top hat";
+}
+for (var penguin in penguins) {
+    delete penguin["outFit"].pants;
+}
+for (var penguin in penguins) {
+    console.log(`${penguins[penguin].outFit}`);
+}
+
+
+
+
+
+  
+ 
+  
\ No newline at end of file
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new file mode 100644
index 0000000..4018d07
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