Apache2 not redirecting non-www request to www

Question

I am trying to redirect my all non-www requests to www . Here is my apache config setting.

RewriteEngine on
RewriteCond %{SERVER_NAME} =example.com [OR]
RewriteCond %{SERVER_NAME} =www.example.com
RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent]

Answer 1

I have changed <VirtualHost *:443> as:

<IfModule mod_ssl.c>
 <VirtualHost *:443>
   RewriteEngine On
   RewriteCond %{HTTP_HOST} ^example.com [NC]
   RewriteRule ^(.*)$ https://www.example.com [L,R=301]
 </VirtualHost>
</IfModule>

Now it's working fine.