 are used to label function arguments (i.e., parameters) and return values.</p>
</section>
<section id="white-space" class="level2">
<h2 class="anchored" data-anchor-id="white-space">White space</h2>
<p>Stan allows spaces between elements of a program. The white space characters allowed in Stan programs include the space (ASCII <code>0x20</code>), line feed (ASCII <code>0x0A</code>), carriage return (<code>0x0D</code>), and tab (<code>0x09</code>). Stan treats all whitespace characters interchangeably, with