Redirect from non-www to www in .htaccess?

Question

htaccess

There is a site that needs to be redirected from domen.com to https://www.domen.com
, that is, no matter what the user writes, redirect it to https from www.
How can I do that?

Answer 1

RewriteCond %{HTTP_HOST} =domen.com [NC]
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L]

Or

RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L]