Sandeep "The Shawn" Tripathy on "Conditional Tags on User or User Role/Type"

I am trying to check if the logged in user is the same as the author who created the post/apge. If this results in true then I want to display some text, if not something else. for now I'm using :

[ Moderator note: code fixed. Please wrap code in the backtick character or use the code button. ]

<?php if(is_user_logged_in() == the_author() ) : ?>
  <p>You wrote this post</p>
<?php else: ?>
  <p>You didn't write this post</p>
<?php endif ?>

I also want to use the above to check the user role.
Turns out, it nothing works.
Help appreciated.