class="constructor">X</span>[0-9<span class="constructor">A</span>-<span class="constructor">F</span>]+</code>), octal (<code class="code">0o[0-7]+</code>), and binary
       (<code class="code">0b[0-1]+</code>) notations are understood).</li>
<li><code class="code">u</code>: reads an unsigned decimal integer.</li>
<li><code class="code">x</code> or <code class="code"><span class="constructor">X</span></code>: reads an unsigned hexadecimal integer (<code class="code">[0-9a-fA-<span class="constructor">F</sp