// Array :- It is collection more the single value inside an variable
// forEach() : This method invoke the function for each element of array
// Array.forEach(callback(value,index,arr),thisArg)
const arr1=[1,2,3,4,5];
const arr2=[];
arr1.forEach(function (value,index){
arr2[index]=value*2;
})
console.log(arr2);
console.log(arr1);