cabsf(3) - Linux man page

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.

These functions first appeared in glibc in version 2.1.

C99.

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