ding on your Stan interface.</p>
<p>A function definition with a body simultaneously declares and defines the named function, as in</p>
<div class="sourceCode" id="cb18"><pre class="sourceCode stan code-with-copy"><code class="sourceCode stan"><span id="cb18-1"><a href="#cb18-1" aria-hidden="true" tabindex="-1"></a><span class="dt">real</span> unit_normal_lpdf(<span class="dt">real</span> y) {</span>
<span id="cb18-2"><a href="#cb18-2" aria-hidden="true" tabindex="-1"></a>  <span class="cf">return</span> -<