CentOS 5.6

GNU/Linux	CentOS 5.6
	cabsl(3)

CABS

NAME

cabs, cabsf, cabsl − absolute value of a complex number

#include <complex.h>

double cabs(double complex z);
float cabsf(float complex z);
long double cabsl(long double complex z);

Link with −lm.

The cabs() function returns the absolute value of the complex number z. The result is a real number.

The function is actually an alias for hypot(a,b) = sqrt(a*a+b*b).

C99