creal3p
Complex real functions
Usage
#include <complex.h>
double creal(double complex z); float crealf(float complex z); long double creall(long double complex z);
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.
Overview
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.1‐2017 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.