uctor">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 least one of the integer and fractional parts must be
    given; the exponent part is optional.
    The <code class="code">_</code> (underscore) character can appear anywhere in the string
    and is ignored.
    Depending on the execution platforms, other representations of
    floating-point numbers can be accepte