/div>
</section>
        
                <section class="desc markdown">
          <p>Returns the sign of the double's numerical value.</p>
<p>Returns -1.0 if the value is less than zero,
+1.0 if the value is greater than zero,
and the value itself if it is -0.0, 0.0 or NaN.</p>
        </section>
                <section class="summary source-code" id="source">
          <h2><span>Implementation</span></h2>
          <pre class="language-dart"><code class="language-dart">double get sign;</code></pre>
    