cabs man page


This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

cabs, cabsf, cabsl — return a complex absolute value


#include <complex.h>

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


The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1‐2008 defers to the ISO C standard.

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

Return Value

These functions shall return the complex absolute value.


No errors are defined.

The following sections are informative.

See Also

The Base Definitions volume of POSIX.1‐2008, <complex.h>