how to add something in an array code example

Example 1: append an array

// initialize array
var arr = [
  "Hi",
  "Hello",
  "Bonjour"
];

// append new value to the array
arr.push("Hola");

console.log(arr);

Example 2: how to add to an array

var ar = ['one', 'two', 'three'];
ar[3] = 'four'; // add new element to ar