How to find last index of array code example

Example 1: Javascript get last item in array

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

Example 2: how to get last element of an array in swifg

let myArray = ["Hello!", "World!"]
let capacity = myArray.count
let lastElement = myArray[capacity-1]
print(lastElement)