.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.TH CONJ 3 2008-08-11 "" "Linux Programmer's Manual"
.SH NAME
conj, conjf, conjl \- calculate the complex conjugate
.SH SYNOPSIS
.B #include <complex.h>
.sp
.BI "double complex conj(double complex " z );
.br
.BI "float complex conjf(float complex " z );
.br
.BI "long double complex conjl(long double complex " z );
.sp
Link with \fI\-lm\fP.
.SH DESCRIPTION
The
.BR conj ()
function returns the complex conjugate value of
.IR z .
That is the value obtained by changing the sign of the imaginary part.
.LP
One has:
.nf

    cabs(z) = csqrt(z * conj(z))
.fi
.SH VERSIONS
These functions first appeared in glibc in version 2.1.
.SH "CONFORMING TO"
C99.
.SH "SEE ALSO"
.BR cabs (3),
.BR sqrt (3),
.BR complex (7)