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fabs(3) [freebsd man page]

FABS(3) 						   BSD Library Functions Manual 						   FABS(3)

NAME
fabs, fabsf, fabsl -- floating-point absolute value functions LIBRARY
Math Library (libm, -lm) SYNOPSIS
#include <math.h> double fabs(double x); float fabsf(float x); long double fabsl(long double x); DESCRIPTION
The fabs(), fabsf() and fabsl() functions compute the absolute value of a floating-point number x. RETURN VALUES
The fabs(), fabsf() and fabsl() functions return the absolute value of x. SEE ALSO
abs(3), ceil(3), floor(3), ieee(3), math(3), rint(3) STANDARDS
The fabs() function conforms to ISO/IEC 9899:1990 (``ISO C90''). The fabsf() and fabsl() functions conform to ISO/IEC 9899:1999 (``ISO C99''). BSD
October 25, 2003 BSD

Check Out this Related Man Page

FABS(3) 						     Linux Programmer's Manual							   FABS(3)

NAME
fabs, fabsf, fabsl - absolute value of floating-point number SYNOPSIS
#include <math.h> double fabs(double x); float fabsf(float x); long double fabsl(long double x); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): fabsf(), fabsl(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99 DESCRIPTION
The fabs() functions return the absolute value of the floating-point number x. RETURN VALUE
These functions return the absolute value of x. If x is a NaN, a NaN is returned. If x is -0, +0 is returned. If x is negative infinity or positive infinity, positive infinity is returned. ERRORS
No errors occur. CONFORMING TO
C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89. SEE ALSO
abs(3), cabs(3), ceil(3), floor(3), labs(3), rint(3) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2008-08-05 FABS(3)
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