n>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a><span class="kw">target +=</span> normal_lpdf(y | mu, sigma);</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<p>Contrast this with the following Stan program:</p>
<div class="sourceCode" id="cb3"><pre class="sourceCode stan code-with-copy"><code class="sourceCode stan"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a>y ~ normal(mu, sigma);</span>
<s