code class="code">printf</code>-style functions from module <code class="code"><span class="constructor">Format</span></code>, <code class="code"><span class="keywordsign">'</span>b</code> is typically
      <code class="code"><span class="constructor">Format</span>.formatter</code>;
      for <code class="code">scanf</code>-style functions from module <code class="code"><span class="constructor">Scanf</span></code>, <code class="code"><span class="keywordsign">'</span>b</code> is typically
      <code clas