span class="constructor">Scanning</span>.stdin</code></a> is
    the predefined formatted input channel that reads from standard input),</li>
</ul>
<ul>
<li>if we define the receiver <code 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> f