creal (3p)

PROLOG

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
 

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);

DESCRIPTION

The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1‐2008 defers to the ISO C standard.
These functions shall compute the real part of z.

RETURN VALUE

These functions shall return the real part value.

ERRORS

No errors are defined.
The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

For a variable z of type complex:
 

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

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

carg(), cimag(), conj(), cproj()
The Base Definitions volume of POSIX.1‐2008, <complex.h>

Information

Source
POSIX
OS/version
IEEE/The Open Group
Source updated
January 1, 2013
Page created
March 3, 2018
Page generated
March 4, 2018