1<html lang="en"> 2<head> 3<title>abs - Untitled</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Untitled"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Stdlib.html#Stdlib" title="Stdlib"> 9<link rel="prev" href="abort.html#abort" title="abort"> 10<link rel="next" href="assert.html#assert" title="assert"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<meta http-equiv="Content-Style-Type" content="text/css"> 13<style type="text/css"><!-- 14 pre.display { font-family:inherit } 15 pre.format { font-family:inherit } 16 pre.smalldisplay { font-family:inherit; font-size:smaller } 17 pre.smallformat { font-family:inherit; font-size:smaller } 18 pre.smallexample { font-size:smaller } 19 pre.smalllisp { font-size:smaller } 20 span.sc { font-variant:small-caps } 21 span.roman { font-family:serif; font-weight:normal; } 22 span.sansserif { font-family:sans-serif; font-weight:normal; } 23--></style> 24<link rel="stylesheet" type="text/css" href="../cs.css"> 25</head> 26<body> 27<div class="node"> 28<a name="abs"></a> 29<p> 30Next: <a rel="next" accesskey="n" href="assert.html#assert">assert</a>, 31Previous: <a rel="previous" accesskey="p" href="abort.html#abort">abort</a>, 32Up: <a rel="up" accesskey="u" href="Stdlib.html#Stdlib">Stdlib</a> 33<hr> 34</div> 35 36<h3 class="section">2.4 <code>abs</code>—integer absolute value (magnitude)</h3> 37 38<p><a name="index-abs-5"></a><strong>Synopsis</strong> 39<pre class="example"> #include <stdlib.h> 40 int abs(int <var>i</var>); 41 42</pre> 43 <p><strong>Description</strong><br> 44<code>abs</code> returns 45the absolute value of <var>i</var> (also called the magnitude 46of <var>i</var>). That is, if <var>i</var> is negative, the result is the opposite 47of <var>i</var>, but if <var>i</var> is nonnegative the result is <var>i</var>. 48 49 <p>The similar function <code>labs</code> uses and returns <code>long</code> rather than <code>int</code> values. 50 51 <p><br> 52<strong>Returns</strong><br> 53The result is a nonnegative integer. 54 55 <p><br> 56<strong>Portability</strong><br> 57<code>abs</code> is ANSI. 58 59 <p>No supporting OS subroutines are required. 60 61 <p><br> 62 63 </body></html> 64 65