javascipt get last element of array

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

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

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