(Noob in wp) can you corect my simple code

i want to disable some functions, but i can’t handle.
i want that the function do the same for “Else” as it does for when “IF” value is met. (i’m bad in english).

<?php if ( get_option( ‘db_version’ ) == $wp_db_version || !is_blog_installed() ) : ?>

what should be written in else field?

<?php else : ?>