Here’s what has worked for me:

RewriteEngine on
rewritecond %{http_host} ^coolexample.com [nc]
rewriterule ^(.*)$ http://www.coolexample.com/$1 [r=301,nc]

Create .htaccess (text) file and put at root directory level.

Now if someone leaves out the “www”, it will be put in, which is good for search engines. They don’t like to find the non-www and the www version, they want one or the other.

If you found this article helpful, please take a moment to share it with your friends, it will be much appreciated. Thanks! Jill