ring</span> : <code class="type">string -&gt; float</code></pre><div class="info ">
<div class="info-desc">
<p>Convert the given string to a float.  The string is read in decimal
    (by default) or in hexadecimal (marked by <code class="code">0x</code> or <code class="code">0<span class="constructor">X</span></code>).
    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;d