@@ -0,0 +1,50 @@
+
+// func declaration
+function demo1(name1)// paramter passed normally  
+
+{
+   console.log("this is",name1);
+   
+}
+
+demo1("leela")// argument to parameter name1
+
+// function declaration can be hosited and it is dynamic
+detail("hello",12,"ckc") // hoisting
+function detail(name2,age,native) // paramter passing
+
+{
+   console.log("this is",name2);
+   console.log("this is",age);  // 
+   console.log("this is",native);
+}
+detail("reeena",6,"che")   // variable passing/input
+detail("shalu",10,"villivaklkam")
+
+// func expression means storing function in one varibale
+let electronic=function (cost,type)  // passing and storing parameter in variable electronic
+{
+   console.log("My Cost is",cost ,"and My Type",type);
+   
+}
+electronic(300,"Fan")
+
+// arrow function
+
+let movie=(name,ticket,snacks)=>
+{
+   console.log("movie is name is ", name ,"and total cost is",(ticket+snacks));
+   
+}
+movie("leo",100,100)
+
+//IIFE
+//create and execute at same place 
+
+(function()
+{
+   console.log("hello");
+   
+}) 
+()  // 
+
@@ -0,0 +1,6 @@
+console.log("javacript"); 
+
+
+//print the output
+
+console.log("java");
@@ -0,0 +1,55 @@
+// Func declaration finding area 
+function area(length,width)
+{
+    console.log("Area:",(length*width));
+    
+}
+area(10,10)
+
+// func expression finding area
+let Area2=function(length2,width2)
+{
+    console.log("Area2:",(length2*width2));
+    }
+Area2(10,10)
+// arrow func finding area
+let area3=(length3,width3)=>
+{
+    console.log("Area3:",(length3*width3));
+    
+} 
+area3(10,10)
+
+//  func declarationFinding percent of subjects 
+
+function percentage(tamil,english,science,chemistry,maths)
+{
+    console.log("percentage is ",(tamil+english+science+chemistry+maths)/500*100);    
+}
+percentage(90,90,90,90,90)
+
+// func expression
+
+let percentage1=function(tamil1,english1,science1,chemistry1,maths1)
+{
+    console.log("percentage1 is",(tamil1+english1+science1+chemistry1+maths1)/500*100);    
+}
+percentage1(90,90,90,90,90)
+
+// arrow function
+
+let percentage2=(tamil2,english2,science2,chemistry2,maths2)=>
+{
+    console.log("percentage2 is",(tamil2+english2+science2+chemistry2+maths2)/500*100);   
+}
+percentage2(90,90,90,90,90)
+
+// IIFE
+(
+function(len,wid)
+{
+    console.log("areaiif is",(len*wid));
+    
+}
+)
+(10,10)
@@ -0,0 +1,89 @@
+let arr=["one",2,"three",4,"five"]// index starts from 0
+
+console.log(arr[4]);
+arr[3]="four";
+console.log(arr);
+
+let fruit=["apple","orange","banana","kiwi","guva"]
+fruit.push("grape"); // inserrt elemet last
+console.log(fruit);
+fruit.pop(); // remove
+console.log(fruit);
+fruit.shift(); // inserrt elemet first
+console.log(fruit);
+fruit.unshift("plum"); // inserrt elemet 
+console.log(fruit);
+
+// slice
+console.log(fruit.slice(2,4));// slice add next value index
+console.log(fruit.slice(-3,-1));  // negative 
+
+//splice
+fruit.splice(2,0,"cherry"); // add
+console.log(fruit);
+fruit.splice(3,1,"tomato"); // update
+console.log(fruit);
+fruit.splice(4,1,); // remove
+console.log(fruit);
+
+// sort reverse
+//let fruit=["apple","orange","banana","kiwi","guva"]
+console.log(fruit.reverse());// reverse order
+
+console.log(fruit.sort()); //alphabetical order
+console.log(fruit.reverse());
+
+//concat index
+
+let fruits=["apple","pomo","banana"]
+let one =[1,1,2,3,4,5,1,2]
+console.log(one.indexOf(1));  // 1 start index 0 1 end index 6
+console.log(one.lastIndexOf(1));
+
+console.log(fruits.concat(one));// combine 2 string
+
+// array method
+
+// map method first get the value check the condition and store it in new array
+
+let num=[1,2,3,4,5,6,7,8,9,10]  // iterated through each value
+ 
+let mul=num.map((el)=>el*5)
+
+    console.log(mul);
+    
+
+
+// filter method store new value in new array based on filter of condition
+let num1=[1,2,3,4,5,6,7,8,9,10]
+let even=num1.filter((el)=>el%2 ===0)
+console.log(even);
+
+
+// find the largest value in array
+
+let num3=[1,2,4,5,78,97]
+
+for(let i=0;i<num3.length;i++)
+
+{
+
+}
+
+let num2=[1,2,3,4,7,10,25,32,56,78,12,75,45]
+let divisablebytwoandfive=num2.filter((el)=> el%2===0 &&el%5===0)
+console.log(divisablebytwoandfive);
+
+
+
+
+// reduce method  it give single output 
+
+let sum=num.reduce((acc,el)=>acc+el,10) // 10 save in accumulator
+console.log(sum);
+
+
+// 
+
+
+
@@ -0,0 +1,72 @@
+
+// callback
+function orderfood(input)
+{
+    setTimeout(() => {
+        console.log("ordered food is done");
+        input()
+    }, 3000);
+}
+
+function eatfood()
+{
+    setTimeout(() => {
+        console.log("eat food is done");
+        
+    }, 2000);
+}
+
+orderfood(eatfood)  // callback is used to call one function call as parameter of other function to covert 2 function in syncronous
+
+// callbackhell
+
+function brush (b)
+{
+    setTimeout(() => {
+        console.log("time take for brush is 2000");
+        b()
+    }, 2000);
+}
+function bath (a)
+{
+    setTimeout(() => {
+        console.log("time take for bath is 2000");
+        a()
+    }, 2500);
+}
+function ready (c)
+{
+    setTimeout(() => {
+        console.log("time take for ready is 1500");
+        c()
+    }, 1500);
+}
+function relax (d)
+{
+    setTimeout(() => {
+        console.log("time take for relax is 500");
+        d()
+    }, 500);
+}
+function eat ()
+{
+    setTimeout(() => {
+        console.log("time take for eat is 2500");
+        
+    }, 2500);
+}
+
+
+brush()
+bath()
+ready()
+relax()
+eat()
+/*brush(()=>{
+    bath(()=>{
+        ready(()=>{
+            relax(eat)
+        })
+    })
+
+})*/
@@ -0,0 +1,74 @@
+function launchapplication (b)
+{
+    setTimeout(() => {
+        console.log("Application opened");
+        b()
+    }, 500);
+}
+function Login (a)
+{
+    setTimeout(() => {
+        console.log("Login with valid user name and password");
+        a()
+    }, 1500);
+}
+function searchitem (c)
+{
+    setTimeout(() => {
+        console.log("Product is searched");
+        c()
+    }, 2000);
+}
+function reviewproduct (d)
+{
+    setTimeout(() => {
+        console.log("Product is reviewed");
+        d()
+    }, 3000);
+}
+function Addtocart (e)
+{
+    setTimeout(() => {
+        console.log(" Product is added to cart");
+        e()
+    }, 3500);
+}
+function Placeorder (f)
+{
+    setTimeout(() => {
+        console.log(" Product send for order");
+        f()
+    }, 200);
+}
+function Payment (g)
+{
+    setTimeout(() => {
+        console.log(" Payment initaited to place order");
+        g()
+    }, 100);
+}
+function Success ()
+{
+    setTimeout(() => {
+        console.log(" Product order ");
+        
+    }, 300);
+}
+
+launchapplication(()=>{
+    Login(()=>{
+        searchitem(()=>{
+            reviewproduct(()=>{
+                Addtocart(()=>{
+                    Placeorder(()=>{
+                        Payment(Success)
+
+                    })
+
+                })
+
+            })
+        })
+    })
+
+})
@@ -0,0 +1,42 @@
+class Details  // detail is class name and it should be in pascal notation 
+
+{
+
+    name="reena";   //properties
+    role="qa";
+
+    demo()    // methods
+    {
+        console.log("My name is",this.name,"my role is ",this.role);
+        
+    }
+}
+
+let one= new Details  // object 
+one.demo()  // to cs
+let two= new Details
+  console.log(two.name);
+console.log(two.role);
+
+
+
+// class using constructor
+
+class Movie{
+    constructor(name1,actname)
+{
+this.name1=name1    // define properties inside constructor
+    this.actname=actname
+}
+   mov()
+   {
+    console.log("movie name is",this.name1);
+    console.log(("actname is:",this.actname));
+    
+    
+   } 
+}
+
+let movie1= new Movie("leo","vijay")
+movie1.mov()
+