e class="code">f</code> as <code class="code"><span class="keyword">let</span>&nbsp;f&nbsp;x&nbsp;=&nbsp;x&nbsp;+&nbsp;1</code>,</li>
</ul>
<p>then <code class="code">bscanf&nbsp;<span class="constructor">Scanning</span>.stdin&nbsp;<span class="string">"%d"</span>&nbsp;f</code> reads an integer <code class="code">n</code> from the
    standard input and returns <code class="code">f&nbsp;n</code> (that is <code class="code">n&nbsp;+&nbsp;1</code>). Thus, if we
    evaluate <code class="code">bscanf&nbsp;stdi