fmt</code> is a format string (the same format strings as those used to print
    material with module <a href="Printf.html"><code class="code"><span class="constructor">Printf</span></code></a> or <a href="Format.html"><code class="code"><span class="constructor">Format</span></code></a>),</li>
</ul>
<ul>
<li><code class="code">f</code> is a function that has as many arguments as the number of values to
    read in the input according to <code class="code">fmt</code>.</li>
</ul>
<h3 id="2_Asimpleexample">A