last element from list javascript

var my_array = /* some array here */;
var last_element = my_array[my_array.length - 1];

const arr = [1,2,3] ;
console.log(arr[arr.length - 1]);

var colors = ["red","blue","green"];
var green = colors[colors.length - 1]; //get last item in the array

const lastItem = colors[colors.length - 1]