cabs(), cabsf(), cabsl()

Compute the absolute value of a complex number

Synopsis:

#include <complex.h>

double cabs(double complex z);

float cabsf(float complex z);

long double cabsl(long double complex z);

libm

Use the -l m option to qcc to link against this library.

These functions compute the absolute value of the complex number specified by z.

To check for error situations, use feclearexcept() and fetestexcept(). For example:

Call feclearexcept(FE_ALL_EXCEPT) before calling cabs(), cabsf(), or cabsl().
On return, if fetestexcept(FE_ALL_EXCEPT) is nonzero, then an error has occurred.

The absolute value of z.

These functions raise FE_INEXACT if the FPU reports that the result can't be exactly represented as a floating-point number.