How to display get_post_meta value saved checkbox

How to display saved checkbox value or if it is not saved in wordpress;

example:

<?php
if($field_name_21=="bathrooms") echo 'Yes have bathrooms';
else { echo 'No have bathrooms; }
if($field_name_21=="wc") echo 'Yes have wc';
else { echo 'No have wc; }
?>