/span> <span class="mdzsyn-string">"def"</span>) <span class="mdzsyn-comment"># -&gt; "abc123def"</span></code></pre><p>The second way is the <code class="mendoza-code">string/join</code> function, which takes an array or tuple
of strings and joins them together. <code class="mendoza-code">string/join</code> can also take an optional
separator string which is inserted between items in the array. All items in the
array or tuple must be byte sequences.
</p>
<pre class="mendoza-codeblock"><code data-language="