# `do` New in version 1.5: The `do` tag was added in Twig 1.5. The `do` tag works exactly like the regular variable expression (`{{ ...}}`) just that it doesn't print anything: <table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1</pre></div></td><td class="code"><div class="highlight"><pre>{% do 1 + 2 %} </pre></div></td></tr></table>