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+<h1> Review and Self Study</h1>
+
+```javascript
+const arr = ["hi",how"","you"];
+const first = arr.pop();
+console.log(first); // this will not only remove last element but it also returns that last element 
+const last = arr.shift();
+console.log(last);  // same goes for this too it not only removes first element but also reeturns it 
+
+```
+```javascript
+const arr = ["hi","how","you"];
+const first = arr.slice(0, 1);// first will store  hi
+const rem = arr.slice(1);     // rem will store how and you
+```
+
+<h1>Challenge</h1>
+<p>
+ since age points 1 and Age points 2, age==Age returns false. other than this, using === compares not only values but also its data types
+</p>
+
+
+
+<h1>Assignment</h1>
+When we are building a shopping cart, we need many things which include user name, his password, an array of all items which contain objects which probably include a name of item and number of such items<br>
+
+
+<p>
+<ul>
+<li>username - username is stored in a String</li>
+<li>password - it might be an alpha-numeric one. so its string</li>
+<li>cart-items - an array of all items in the cart</li>
+<li>a list of objects where each object can store a name and a value where value is number of items of that type</li>
+</ul>
+</p>
+
diff --git a/1-js-basics/2-functions-methods/solution.md b/1-js-basics/2-functions-methods/solution.md
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+<h1> Challenge</h1>
+<p>method is something that belong to an object or a class. It is also defined within a class defination. <br>
+while function is something that can be defined any where and used anywhere. A method can only be used to manipulate or something related to it to a class or its objects
+</p>
+
+
+
+
+<h1>assignment</h1>
+
+```javascript
+function funct1(a){
+	console.log(a);
+} 
+```
+or it can be written the following way
+
+```javascript
+function funct2(a){
+	return a;
+}
+```
+here is a function with default and normal parameters
+
+```javascript
+function funct3( a =2 , b){
+	console.log(a+b);
+}
+```
+
diff --git a/1-js-basics/3-making-decisions/solution.md b/1-js-basics/3-making-decisions/solution.md
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+<h1> Challenge </h1>
+
+```javascript
+if(x>5){
+	print(x)
+}else{
+	print("no")
+}
+```
+with ternery operator,
+
+```javascript
+let var = (x>5)? print(5) : print("no")
+```
+
+<h1> Assignment</h1>
+
+```javascript
+studentsWhoPass=[];
+for(let i=0, i<6, i++){
+	if !(allStudents[i]=="C-" || allStudents[i]==2 || allStudents[i]==1){
+		studentsWhoPass.push(allStudents[i]);
+		}
+}
+
diff --git a/1-js-basics/4-arrays-loops/solution.md b/1-js-basics/4-arrays-loops/solution.md
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+# Review & Self Study
+
+
+```javascript
+const items = ["item1", "item2", "item3"];
+const copyItems = [];
+
+for (let i = 0; i < items.length; i++) {
+  copyItems.push(items[i]);
+}
+
+items.forEach((item) => {
+  copyItems.push(item);
+});
+```
+# Challenge
+```javascript
+array=[1,2,3,4]
+array.forEach((element) => console.log(element));
+```
+
+# Assignment
+```javascript
+for(let i = 1, i <= 20,i++){
+	if (i%3==0){console.log(i);}
+}
+```
+
+
+
+
+