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FreeBSD 11.0 - man page for abs (freebsd section 3)

ABS(3)							   BSD Library Functions Manual 						    ABS(3)

NAME
abs -- integer absolute value function
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h> int abs(int j);
DESCRIPTION
The abs() function computes the absolute value of the integer j.
RETURN VALUES
The abs() function returns the absolute value.
SEE ALSO
cabs(3), fabs(3), floor(3), hypot(3), imaxabs(3), labs(3), llabs(3), math(3)
STANDARDS
The abs() function conforms to ISO/IEC 9899:1999 (``ISO C99'').
BUGS
The absolute value of the most negative integer remains negative.
BSD
November 14, 2001 BSD