keywordsign">|</span><span class="constructor">E</span>) [+|-] dd </code>, where <code class="code">d</code> stands for a decimal digit.
   The format of hexadecimal floating-point numbers is
   <code class="code"> [-] 0(x<span class="keywordsign">|</span><span class="constructor">X</span>) hh.hhh (p<span class="keywordsign">|</span><span class="constructor">P</span>) [+|-] dd </code>, where <code class="code">h</code> stands for an
   hexadecimal digit and <code class="code">d</code> for a decimal digit.
 