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/*
FUNCTION
<<abs>>---integer absolute value (magnitude)
 
INDEX
	abs
 
ANSI_SYNOPSIS
	#include <stdlib.h>
	int abs(int <[i]>);
 
TRAD_SYNOPSIS
	#include <stdlib.h>
	int abs(<[i]>)
	int <[i]>;
 
DESCRIPTION
<<abs>> returns
@tex
$|x|$,
@end tex
the absolute value of <[i]> (also called the magnitude
of <[i]>).  That is, if <[i]> is negative, the result is the opposite
of <[i]>, but if <[i]> is nonnegative the result is <[i]>.
 
The similar function <<labs>> uses and returns <<long>> rather than <<int>> values.
 
RETURNS
The result is a nonnegative integer.
 
PORTABILITY
<<abs>> is ANSI.
 
No supporting OS subroutines are required.
*/
 
#include <stdlib.h>
 
int
_DEFUN (abs, (i), int i)
{
  return (i < 0) ? -i : i;
}