js push and return array code example
Example 1: append array js
var colors= ["red","blue"];
colors.push("yellow"); //["red","blue","yellow"]
Example 2: js combine two arrays
const letters = ['a', 'b', 'c'];
const numbers = [1, 2, 3];
letters.concat(numbers);
// result in ['a', 'b', 'c', 1, 2, 3]