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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.TH CABS 3 2007-12-26 "" "Linux Programmer's Manual"
.SH NAME
cabs, cabsf, cabsl \- absolute value of a complex number
.SH SYNOPSIS
.B #include <complex.h>
.sp
.BI "double cabs(double complex " z );
.br
.BI "float cabsf(float complex " z );
.br
.BI "long double cabsl(long double complex " z );
.sp
Link with \fI\-lm\fP.
.SH DESCRIPTION
The
.BR cabs ()
function returns the absolute value of the complex number
.IR z .
The result is a real number.
.SH "CONFORMING TO"
C99.
.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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