display admin if is admin

I didnt know what to do.. post or not.. I’ve seen other threads not being responded and that you are inactive for about a year.. but trying my luck over here.. So

if (current_user_can( 'manage_options' )) {
echo 'admin'
}
elseif (current_user_can( 'moderate_comments' )) {
echo 'moderator'
}
endif return $rank

how would I implement this or something close to it in your plugin… to display if admin – admin ( and forget about the rank ) .. and moderator ..
Thanks

http://wordpress.org/extend/plugins/simple-user-rank-comments/