creal(3) Linux Man Page - System Grab Bag

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). allbox; lbx lb lb T{ creal()crealf()creall()

Interface	Attribute	Value
T}	Thread safety	MT-Safe

GCC supports also __real__. That is a GNU extension.

glibc 2.1. C99, POSIX.1-2001.