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<h1 class='fqn'><span class='in-band'>Function <a href='index.html'>num</a>::<wbr><a class="fn" href=''>signum</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/num_traits/sign.rs.html#175' title='goto source code'>[src]</a></span></h1>
<pre class='rust fn'>pub fn signum<T>(value: T) -> T <span class="where fmt-newline">where<br> T: <a class="trait" href="../num/trait.Signed.html" title="trait num::Signed">Signed</a>, </span></pre><div class='docblock'><p>Returns the sign of the number.</p>
<p>For <code>f32</code> and <code>f64</code>:</p>
<ul>
<li><code>1.0</code> if the number is positive, <code>+0.0</code> or <code>INFINITY</code></li>
<li><code>-1.0</code> if the number is negative, <code>-0.0</code> or <code>NEG_INFINITY</code></li>
<li><code>NaN</code> if the number is <code>NaN</code></li>
</ul>
<p>For signed integers:</p>
<ul>
<li><code>0</code> if the number is zero</li>
<li><code>1</code> if the number is positive</li>
<li><code>-1</code> if the number is negative</li>
</ul>
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