Exercise : Various Array Methods

variousArrayMethods.md

let arr = [4,7];
//part 1  use unshift method to add 7 to the list and print the array.
//part 2- use push method to add 10 and 2 to the list  and print the array.
//part 3- use shift method twice to remove first two items from the list  and print the array.
//part 4- use pop method to remove the last item from the list  and print the array.