efault value. If the
index is out of bounds it will return <code class="mendoza-code">nil</code> or the given default value.
</p>
<pre class="mendoza-codeblock"><code data-language="janet">(<span class="mdzsyn-coresym">def</span> <span class="mdzsyn-symbol">arr</span> @[<span class="mdzsyn-keyword">:a</span> <span class="mdzsyn-keyword">:b</span> <span class="mdzsyn-keyword">:c</span> <span class="mdzsyn-keyword">:d</span>])
(<span class="mdzsyn-coresym">in</span> <span class="mdzsyn-symbol">arr</span> <spa