CABS

Section: Linux Programmer's Manual (3)
Updated: 2015-04-19
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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);

Link with -lm.  

DESCRIPTION

These functions return 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.  

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
cabs(), cabsf(), cabsl()	Thread safety	MT-Safe

 

CONFORMING TO

C99, POSIX.1-2001, POSIX.1-2008.  

NOTES

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

SEE ALSO

abs(3), cimag(3), hypot(3), complex(7)  

COLOPHON

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Index

NAME

SYNOPSIS

DESCRIPTION

VERSIONS

ATTRIBUTES

CONFORMING TO

NOTES

SEE ALSO

COLOPHON