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