signbit3
Determine whether a floating-point number's sign is negative
Usage
#include <math.h>
int
signbit(real-floating x);
Library
Math Library (libm, -lm)
Overview
The signbit() macro takes an argument of x and returns non-zero if the value of its sign is negative, otherwise 0.
Releases
55 releases since FreeBSD 5.1-RELEASE; the text changed 33 times.