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'\" t
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\"
.\" SPDX-License-Identifier: GPL-1.0-or-later
.\"
.TH cabs 3 2023-07-20 "Linux man-pages 6.05.01"
.SH NAME
cabs, cabsf, cabsl \- absolute value of a complex number
.SH LIBRARY
Math library
.RI ( libm ", " \-lm )
.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 );
.fi
.SH DESCRIPTION
These functions return the absolute value of the complex number
.IR z .
The result is a real number.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lbx lb lb
l l l.
Interface Attribute Value
T{
.na
.nh
.BR cabs (),
.BR cabsf (),
.BR cabsl ()
T} Thread safety MT-Safe
.TE
.sp 1
.SH STANDARDS
C11, POSIX.1-2008.
.SH HISTORY
glibc 2.1.
C99, POSIX.1-2001.
.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)
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