FABS(3) | Linux Programmer's Manual | FABS(3) |
NAME
fabs, fabsf, fabsl - absolute value of floating-point numberSYNOPSIS
#include<math.h>
double fabs(double x );
float fabsf(float x );
long double fabsl(long double x );
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or
cc -std=c99
DESCRIPTION
These functions return the absolute value of the floating-point number x.RETURN VALUE
These functions return the absolute value of x.ERRORS
No errors occur.ATTRIBUTES
Multithreading (see pthreads(7))
The fabs(), fabsf(), and fabsl() functions are thread-safe.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 3.53 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/.2013-07-10 |