How to extract a last character from a string in js code example

Example 1: javascript remove last character from string

var str = "Hello";
var newString = str.substring(0, str.length - 1); //newString = Hell

Example 2: get last letter of string javascript

// Get last n characters from string
var name = 'Shareek';
var new_str = name.substr(-5); // new_str = 'areek'