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fabs(3) [netbsd man page]

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

fabs, fabsf -- floating-point absolute value function LIBRARY
Math Library (libm, -lm) SYNOPSIS
#include <math.h> double fabs(double x); float fabsf(float x); DESCRIPTION
The fabs() and fabsf() functions compute the absolute value of a floating-point number x. RETURN VALUES
The fabs() function returns the absolute value of x. SEE ALSO
abs(3), ceil(3), floor(3), math(3), rint(3) STANDARDS
The fabs() function conforms to ANSI X3.159-1989 (``ANSI C89''). BSD
May 2, 1991 BSD

Check Out this Related Man Page

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

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 2008-08-05 FABS(3)
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