.htaccess - htaccess site ip redirect to www -

i have few rules set redirecting users, none www www.

but google still indexing site ip address redirect www.and same if user tried it

dose 1 know how write in htaccess file ??

redirect request host not start www.

rewritecond %{http_host} !^www\. [nc] rewriterule ^(.*)$ http://www.example.com/$1 [r=301,l]