How to show ‘www’ in my WordPress site URL

To have 'www' in your WP website do the following:

1.Login to your WordPress site as an Admin
2.Go to the Dashboard-> settings-> General
3. Add “www’’ to the WordPress Address (URL) and Site Address (URL) text fields
4.Click Save Changes
Note: make sure you don’t make any mistakes in the URL because any mistake here would prevent you from login to your site

worth a try..thanks