de">scanf</code>-style functions).</li>
</ul>
<ul>
<li><code class="code"><span class="keywordsign">'</span>b</code> is the type of input source for formatted input functions and the
      type of output target for formatted output functions.
      For <code class="code">printf</code>-style functions from module <code class="code"><span class="constructor">Printf</span></code>, <code class="code"><span class="keywordsign">'</span>b</code> is typically
      <code class="code">out_channel</code>;
      for <