5.Spread&Rest.js

 // Normal function
function sumOfElement(a,b){
    return a+b
}

console.log(sumOfElement(10,40,50,60)) // In C language we get error becouse of the argus are not eqal tothe paramter

// ---  Rest parameter  --- 

function sumOfElement(...a){ //...a is a rest parameter
    return a.reduce((acc,el)=> acc+el)
}

console.log(sumOfElement(10,40,50,60)) 
console.log(sumOfElement(10,40,50,60,50)) 
console.log(sumOfElement(10,40,50,60,50,56,366,567)) 

// // Spread syntax
// //marge array
// let arr1 = [10,20]
// let arr2 = [30,40]
// let arr3 = [50,60]

// let margeArray = [...arr1 ,...arr2,...arr3]


// // marge object 
// let obj1 = {
//     a:10,
//     b :20
// }
// let obj2 = {
//     a:30,
//     b :40
// }
// let margeObj = {...obj1,obj2}


// //Creating capies
// let arr = [10,30]
// let copyArr = [...arr]
// arr.push(30)
// console.log("Initial array",arr)
// console.log("copy arr",copyArr)

// //Destrucuring 
// //array
// let numbers =    [10,20,30]

// let [a,b,c] = numbers
// console.log(a)
// console.log(b)
// console.log(c)


// //object
// let person = {
//     id : 300,
//     salary:30000
// }
// let {id,salary} = person

// //modules
// //m1
// let username1 = "surya"

// //export
// export default username1

// //main.js
// import username1 from './m1.js'

// //--------------------

// //person.js
// class Person {
//     constructor(id,name,city){
//         this.name = name
//         this.id = id
//         this.city = city
//     }
//     printData(){
//         console.log("name",this.name)
//         console.log("id",this.id)
//     }
// }

// export default Person

// // main.js
// import Person from "./person.js" // name must be the class name 

// var resultValue = new Person(2334,"Vishwa","HYD")
// //import {YourChoosenName} from "./location.js"
// //for this we can export 
// //export Person = () => {
// //    logic
// //}


// // Default export   |       import Person from './person.js'

// //  Default export   |       import prs from './person.js'

// // named export   |         named export  |  import {smth} from './unility.js'

// // named export   |         import {smth as Smth } from './unility.js'

// // named export  importing every thing from file  |      import * as bundled from './unility.js'

// //*******       CLASS     ********

// class Human {
//     constructor( ) {//constructor
//       this.gender = "Male"
//     }
//   printGender( ){ //method 
//      console.log(this.gender);
//   }
// }
// class Person extends Human( ){
//  constructor ( ) {
//      super (); //To access the base class
//      this.name = 'vishwa';
//  }
// printMyName ( ){
//   console.log ( this.name )
//    }
// }
// const person = new Person( );
// person.printMyName()
// person.printGender()

// //let & const this are newly implemented in ES6
// //let is like var
// // const is like constant   //once assign no modifiy
// var myName = 'Vishwanath'
// console.log(myName)
// myName = "Manu"
// console.log(myName)//Name is changed 

// let MyName1 = "Ramu"
// console.log(MyName1)
// myName1 = "Ramesh"
// console.log(myName)


// //const 
// const myName2 = 'Ramu Kumar'
// console.log(myName2)

// //myName2 = 'Ramu'  Here to