crealf (3)

#include <complex.h>

double creal(double complex z);

float crealf(float complex z);

long double creall(long double complex z);

Link with -lm.

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

One has:

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

These functions first appeared in glibc in version 2.1.

Multithreading (see pthreads(7))

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

C99.

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

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

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