signbit3
Determine whether a floating-point number's sign is negative
Usage
#include <math.h>
int
signbit(real-floating x);
Library
Standard C Library (libc, -lc)
Overview
The signbit() macro takes an argument of x. It returns non-zero if the value of the argument's sign is negative, otherwise 0.
Releases
135 releases since Mac OS X 10.4; the text changed 1 time.