how to get last word in string javascript code example

Example 1: javascript get last character in string

var hello = "Hello World";
var lastCharOfHello=hello.slice(-1);//d

Example 2: javascript remove last character from string

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

Example 3: javascript get last word in string

// strips all punctuation and returns the last word of a string
// hyphens (-) aren't stripped, add the hyphen to the regex to strip it as well
function lastWord(words) {
    let n = words.replace(/[\[\]?.,\/#!$%\^&\*;:{}=\\|_~()]/g, "").split(" ");
    return n[n.length - 1];
}

Example 4: inbuilt javascript functions for last word check

function test(words) {

var n = words.indexOf(" ");
var res = words.substring(n+1,-1);
return res;

}