SYNOPSIS

#include <complex.h>

double creal(double complex z);

float crealf(float complex z);

long double creall(long double complex z);

Link with -lm.

DESCRIPTION

The creal() function returns the real part of the complex number z.

One has:

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

VERSIONS

These functions first appeared in glibc in version 2.1.

ATTRIBUTES

Multithreading (see pthreads(7))

The creal(), crealf(), and creall() functions are thread-safe.

CONFORMING TO

C99.

NOTES

The gcc supports also __real__. That is a GNU extension.

RELATED TO creall…

COLOPHON

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