www.LinuxHowtos.org

creal

Section: C Library Functions (3)
Updated: 202-0-08
Index Return to Main Contents

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	M-Safe

GCC supports also __real__. That is a GNU extension.

C11, POSIX.-2008.

glibc 2.1. C99, POSIX.-2001.