last element of an array javascript

1let arr = [1,2,3]
2arr[arr.length - 1] //returns last element in an array

1const heroes = ["Batman", "Superman", "Hulk"];
2const lastHero = heroes.pop(); // Returns last elment of the Array
3// lastHero = "Hulk"

1var my_array = /* some array here */;
2var last_element = my_array[my_array.length - 1];

1var colors = ["red","blue","green"];
2var green = colors[colors.length - 1];//get last

1var myArray = [1, 2, 3, 4];
2myArray[myArray.length - 1];

1let arr = ['a', 'b', 'c']
2arr.slice(-1)[0] // returns last element in an array