# `constant` `constant` checks if a variable has the exact same value as a constant. Youcan use either global constants or class constants: <table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1 2 3</pre></div></td><td class="code"><div class="highlight"><pre>{% if post.status is constant('Post::PUBLISHED') %} the status attribute is exactly the same as Post::PUBLISHED {% endif %} </pre></div></td></tr></table> You can test constants from object instances as well: <table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1 2 3</pre></div></td><td class="code"><div class="highlight"><pre>{% if post.status is constant('PUBLISHED', post) %} the status attribute is exactly the same as Post::PUBLISHED {% endif %} </pre></div></td></tr></table>