cabs.3   [plain text]


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.\"     from: @(#)hypot.3	6.7 (Berkeley) 5/6/91
.\"	$Id: cabs.3,v 1.5 2004/12/20 21:35:44 scp Exp $
.\"
.Dd January 28, 2003
.Dt CABS 3
.Os BSD 4
.Sh NAME
.Nm cabs
.Nd complex absolute value function
.Sh SYNOPSIS
.Fd #include <complex.h>
.Ft double
.Fn cabs "complex"
.Ft long double
.Fn cabsl "long double complex"
.Ft float
.Fn cabsf "float complex"
.Sh DESCRIPTION
The
.Fn cabs
function computes the complex absolute value (also called norm, modulus, or
magnitude) of z, without undue underflow or overflow. It is specified by
.Fn cabs "x+iy"
= 
.Fn hypot "x" "y"
.Sh SEE ALSO
.Xr hypot 3 ,
.Xr math 3 ,
.Xr sqrt 3
.Sh STANDARDS
The
.Fn cabs
function conforms to ISO/IEC 9899:1999(E).