pan class="nv">error</span>. <span class="nv">A</span> <span class="nv">value</span> <span class="nv">of</span> <span class="nv">NaN</span> <span class="nv">is</span>
          <span class="nv">returned</span> <span class="nv">on</span> <span class="nv">error</span> <span class="nv">by</span> <span class="nv">default</span>.
</code></pre></div>

<h2 id="returns">RETURNS</h2>
<div class="codehilite"><pre><span></span><code> s2v      numeric value read from string
</code></pre></div>

<h2 id="example">EXAMPLE