HP-UX Reference (11i v1 00/12) - 3 Library Functions A-M (vol 6)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man3/!!!intro.3c
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f
fabs(3M) fabs(3M)
NAME
fabs(), fabsf() - absolute value functions
SYNOPSIS
#include <math.h>
double fabs(double x);
float fabsf(float x);
DESCRIPTION
The fabs() function returns the absolute value of x,|x|.
The fabsf() function is a float version of fabs(); it takes a float argument and returns a float
result. To use this function, compile either with the default -Ae option or with the -Aa and
-D_HPUX_SOURCE options.
The fabsf() function is not specified by any standard, but it is named in accordance with the conventions
specified in the "Future Library Directions" section of the ANSI C standard.
To use these functions, make sure your program includes <
math.h>, and link in the math library by speci-
fying
-lm on the compiler or linker command line.
RETURN VALUE
If x is ±INFINITY, fabs() returns +INFINITY.
If if x is NaN,
fabs() returns NaN.
If the correct value after rounding would be smaller in magnitude than MINDOUBLE, fabs() returns
zero.
ERRORS
No errors are defined.
SEE ALSO
abs(3C), ceil(3M), floor(3M), fmod(3M), rint(3M), math(5), values(5).
STANDARDS CONFORMANCE
fabs(): SVID3, XPG4.2, ANSI C
HP-UX Release 11i: December 2000 − 1 − Section 3−−213
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