n-number">100</span> <span class="mdzsyn-keyword">:default</span>) <span class="mdzsyn-comment"># -&gt; :default</span></code></pre><p>Instead of <code class="mendoza-code">in</code> you can also use the array as a function with the index as
an argument or call the index as a function with the array as the first
argument.
</p>
<pre class="mendoza-codeblock"><code data-language="janet">(<span class="mdzsyn-symbol">arr</span> <span class="mdzsyn-number">2</span>) <span class="mdzsyn-comment"># -&gt; :c</span>