.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\"
.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
.\" Distributed under GPL
.\" %%%LICENSE_END
.\"
.TH CABS 3 2021-03-22 "" "Linux Programmer's Manual"
.SH NAME
cabs, cabsf, cabsl \- absolute value of a complex number
.SH SYNOPSIS
.nf
.B #include <complex.h>
.PP
.BI "double cabs(double complex " z );
.BI "float cabsf(float complex " z );
.BI "long double cabsl(long double complex " z );
.PP
Link with \fI\-lm\fP.
.fi
.SH DESCRIPTION
These functions return the absolute value of the complex number
.IR z .
The result is a real number.
.SH VERSIONS
These functions first appeared in glibc in version 2.1.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.ad l
.nh
.TS
allbox;
lbx lb lb
l l l.
Interface	Attribute	Value
T{
.BR cabs (),
.BR cabsf (),
.BR cabsl ()
T}	Thread safety	MT-Safe
.TE
.hy
.ad
.sp 1
.SH CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.
.SH NOTES
The function is actually an alias for
.I "hypot(a,\ b)"
(or, equivalently,
.IR "sqrt(a*a\ +\ b*b)" ).
.SH SEE ALSO
.BR abs (3),
.BR cimag (3),
.BR hypot (3),
.BR complex (7)
.SH COLOPHON
This page is part of release 5.13 of the Linux
.I man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%https://www.kernel.org/doc/man\-pages/.