how to get the length of strings in javascript code example

Example 1: javascript length

var colors = ["Red", "Orange", "Blue", "Green"];
var colorsLength=colors.length;//4 is colors array length 

var str = "bug";
var strLength=str.length;//3 is the number of characters in bug

Example 2: length of string in javascript

var str = "Hello World!";
var n = str.length;