creal - Man Page

get real part of a complex number

Library

Math library (libm, -lm)

Synopsis

#include <complex.h>

double creal(double complex z);
float crealf(float complex z);
long double creall(long double complex z);

Description

These functions return the real part of the complex number z.

One has:

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

Attributes

For an explanation of the terms used in this section, see attributes(7).

InterfaceAttributeValue
creal(), crealf(), creall()Thread safetyMT-Safe

Versions

GCC supports also __real__. That is a GNU extension.

Standards

C11, POSIX.1-2008.

History

glibc 2.1. C99, POSIX.1-2001.

See Also

cabs(3), cimag(3), complex(7)

Referenced By

cimag(3), complex(7).

The man pages crealf(3) and creall(3) are aliases of creal(3).

2024-05-02 Linux man-pages 6.9.1