creal(3)

NAME

creal, crealf, creall - get real part of a complex number

Math library (libm, -lm)

#include <complex.h>

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

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

One has:

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

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

Interface	Attribute	Value
creal(), crealf(), creall()	Thread safety	MT-Safe

GCC supports also __real__. That is a GNU extension.

C11, POSIX.1-2008.

glibc 2.1. C99, POSIX.1-2001.