Remove www & force https from URL using htaccess

By Using below code we are able to remove www and force https from URL using htacces

   RewriteEngine On

   RewriteCond %{HTTP_HOST} ^www.greenrobot.com$ [NC]

   RewriteRule ^(.*)$ https://greenrobot.com/$1 [R=301,L]

   RewriteCond %{HTTPS} off

   RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R,L]

Or 

<IfModule mod_rewrite.c>

   RewriteEngine on

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

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

</IfModule>