creal

(3)

get real part of a complex number

Library functionsmanpages-dev 6.9.1-1also documents crealf, creall

#include <complex.h> double creal(double complex z); float crealf(float complex z); long double creall(long double complex z);

LIBRARY

Math library (libm, -lm)

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.