>.</li>
<li><code class="code">(&nbsp;fmt&nbsp;%)</code>: format string substitution. Take a format string
     argument and substitute it to the internal format string <code class="code">fmt</code>
     to print following arguments. The argument must have the same
     type as the internal format string <code class="code">fmt</code>.</li>
<li><code class="code">!</code>: take no argument and flush the output.</li>
<li><code class="code">%</code>: take no argument and output one <code class="code">%</code> 