>).
    The format of decimal floating-point numbers is
    <code class="code">&nbsp;[-]&nbsp;dd.ddd&nbsp;(e<span class="keywordsign">|</span><span class="constructor">E</span>)&nbsp;[+|-]&nbsp;dd&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="constr