How to add or remove WWW on URLs using htaccess.

How to add or remove WWW on URLs using htaccess. Adding www to your site url using .htaccess

RewriteEngine On
RewriteCond %{HTTP_HOST} ^yoursite.in$ 
RewriteRule (.*) http\:\/\/www\.yoursite\.in\/$1 [R=301]

Removing www from your site url using .htaccess

RewriteCond %{HTTP_HOST} ^yoursite\.in$ [OR]
RewriteCond %{HTTP_HOST} ^www\.yoursite\.in$ [NC]
RewriteRule ^/?$ "http\:\/\/yoursite\.in\/" [R=301,L]