cabs(3) — Linux manual pages

Linux manual pages	Section 3

Name

cabs, cabsf, cabsl — 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);

	Note
	Link with `−lm`.

DESCRIPTION

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

VERSIONS

These functions first appeared in glibc in version 2.1.

CONFORMING TO

C99.

NOTES

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

COLOPHON

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