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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.TH CREAL 3 2002-07-28 "" "complex math routines"
.SH NAME
creal, crealf, creall \- get real part of a complex number
.SH SYNOPSIS
.B #include <complex.h>
.sp
.BI "double creal(double complex " z );
.br
.BI "float crealf(float complex " z );
.br
.BI "long double creall(long double complex " z );
.sp
Link with \-lm.
.SH DESCRIPTION
The
.BR creal ()
function returns the real part of the complex number z.
.LP
One has z = creal(z) + I*cimag(z).
.SH NOTE
The gcc supports also __real__. That is a GNU extension.
.SH "CONFORMING TO"
C99
.SH "SEE ALSO"
.BR cabs (3),
.BR cimag (3),
.BR complex (7)
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