.htaccess 301 redirect from main domain to subdomain -

What should I be kept in .htaccess to redirect all links to the subdomain from the main domain? I feel like this but it is not wok:

  rewrite% {HTTP_HOST} ^ http: //example.com/$ rewrite rule ^ (. *) $ Http: //subdomain.example Com / $ 1 [R = 301, L]  

Did you Http : // and in the first row / in the end?

  rewrite% {HTTP_HOST} ^ example.com $ [or] RewriteCond% {HTTP_HOST} ^ www.example.com $ RewriteRule ^ (. *) $ Http: //subdomain.example. Com / $ 1 [R = 301, L]