NAME

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

LIBRARY

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)

These functions were added in glibc 2.1.

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

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

C99, POSIX.1-2001, POSIX.1-2008.

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