printf</code> at the current point.</li>
<li><code class="code">t</code>: same as <code class="code">%a</code>, but take only one argument (with type
     <code class="code">out_channel&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit</code>) and apply it to <code class="code">outchan</code>.</li>
<li><code class="code">{&nbsp;fmt&nbsp;%}</code>: convert a format string argument to its type digest.
     The argument must have the same type as the internal format string
     <code class="code">fmt</code