NAME

creal, crealf, creall — complex real functions

SYNOPSIS

#include <complex.h>

double
creal(double complex z);

float
crealf(float complex z);

long double
creall(long double complex z);

#include <tgmath.h>

complex-float
creal(complex-float z);

DESCRIPTION

These functions compute the real part of z.

RETURN VALUES

These functions return the real part value.

ERRORS

No errors are defined.

APPLICATION USAGE

For a variable z of type complex:

z == creal(z) + cimag(z)*I

SEE ALSO

carg(3), cimag(3), conj(3), cproj(3), IEEE Std 1003.1-2001 (“POSIX.1”) ⟨complex.h⟩

COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .