array last second last 3 last add in new array javascript code example

Example 1: find last element in array javascript

const numArray = [1,2,3,4,5];
const lastNumber = numArray.reverse()[0];

Example 2: javascript get second last element in array

const myNumbers = [100, 200, 300, 400, 500];
// option one
const seconLastNumber = myNumbers.slice(-2, -1)[0]) // 400

// option two
const seconLastNumber = myNumbers[numbers.length - 2]; // 400