h1 number="1"><span class="header-section-number">1</span> Void Functions</h1>
<p>Stan does not technically support functions that do not return values.
It does support two types of statements, one printing and one for rejecting
outputs.</p>
<p>Although <code>print</code> and <code>reject</code> appear to have the syntax of functions,
they are actually special kinds of statements with slightly different
form and behavior than other functions. First, they are the
constructs that allow a variable number of ar