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abs [C++ Reference]
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<h2><a name="abs" id="abs">abs</a></h2>
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<p>
Syntax:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <cstdlib></span>
<span class="kw4">int</span> abs<span class="br0">(</span> <span class="kw4">int</span> num <span class="br0">)</span><span class="sy0">;</span></pre>
<p>
The abs() function returns the absolute value of num. For example:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="kw4">int</span> magic_number <span class="sy0">=</span> <span class="nu0">10</span><span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="st0">"Enter a guess: "</span><span class="sy0">;</span>
cin <span class="sy0">>></span> x<span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="st0">"Your guess was "</span> <span class="sy0"><<</span> abs<span class="br0">(</span> magic_number <span class="sy0">-</span> x <span class="br0">)</span> <span class="sy0"><<</span> <span class="st0">" away from the
magic number."</span> <span class="sy0"><<</span> endl<span class="sy0">;</span></pre>
<p>
C++ also provides the following overloaded forms:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <cstdlib></span>
<span class="kw4">long</span> abs<span class="br0">(</span> <span class="kw4">long</span> num <span class="br0">)</span><span class="sy0">;</span> <span class="co1">// same as labs()</span>
<span class="co2">#include <cmath></span>
<span class="co1">// the following are synonyms for fabs()</span>
<span class="kw4">float</span> abs<span class="br0">(</span> <span class="kw4">float</span> num <span class="br0">)</span><span class="sy0">;</span>
<span class="kw4">double</span> abs<span class="br0">(</span> <span class="kw4">double</span> num <span class="br0">)</span><span class="sy0">;</span>
<span class="kw4">long</span> <span class="kw4">double</span> abs<span class="br0">(</span> <span class="kw4">long</span> <span class="kw4">double</span> num <span class="br0">)</span><span class="sy0">;</span></pre>
<p>
Related Topics: <a href="../../c/math/fabs.html" class="wikilink1" title="c:math:fabs">fabs</a>, <a href="../../c/math/labs.html" class="wikilink1" title="c:math:labs">labs</a>
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