FABS(3M) Mathematical Library Functions FABS(3M)

fabs, fabsf, fabsl - absolute value function

c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
double fabs(double x);

float fabsf(float x);

long double fabsl(long double x);

These functions compute the absolute value of x, |x|.

Upon successful completion, these functions return the absolute value of x.

If x is NaN, a NaN is returned.

If x is ±0, +0 is returned.

If x is ±Inf, +Inf is returned.

No errors are defined.

See attributes(7) for descriptions of the following attributes:

Interface Stability Standard
MT-Level MT-Safe

math.h(3HEAD), isnan(3M), attributes(7), standards(7)

July 12, 2006 SunOS 5.11