2.1 cabs, cabsf, cabsl—complex absolute-value

Synopsis

#include <complex.h>
double cabs(double complex z);
float cabsf(float complex z);
long double cabsl(long double complex z);

Description
These functions compute compute the complex absolute value (also called norm, modulus, or magnitude) of z.

cabsf is identical to cabs, except that it performs its calculations on float complex.

cabsl is identical to cabs, except that it performs its calculations on long double complex.

Returns
The cabs* functions return the complex absolute value.

Portability
cabs, cabsf and cabsl are ISO C99