Originální popis anglicky:
fabs, fabsf, fabsl - absolute value of floating-point number
Návod, kniha: Linux Programmer's Manual
#include <math.h>
double fabs(double x);
float fabsf(float x);
long double fabsl(long double x);
Link with -lm.
The
fabs functions return the absolute value of the floating-point number
x.
No errors can occur.
The
fabs() function conforms to SVID 3, POSIX, BSD 4.3, ISO 9899. The
other functions are from C99.
abs(3),
ceil(3),
floor(3),
labs(3),
rint(3)
