how to take out the first item in array js code example

Example 1: javascript remove first element from array

var arr = [1, 2, 3, 4]; 
var theRemovedElement = arr.shift(); // theRemovedElement == 1
console.log(arr); // [2, 3, 4]

Example 2: javascript get first element of array

let mylist = ['one','two','three','last']
mylist[0],mylist[1],mylist[2],mylist[3]//this is called indexing and slicing in python
//in javascript it called getting elements in array