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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;

}