modify arrray js code example

Example 1: js array modify element

people[0] = "Georgie";

Example 2: how to modify an array

let firstNumbers = [1, 2, 3];
let secondNumbers = [4, 5, 6];
let merged = firstNumbers.concat(secondNumbers);
console.log(merged); // [1, 2, 3, 4, 5, 6]