CREAL(3) Linux Programmer s Manual CREAL(3)

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

SYNOPSIS #include <complex.h>

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

Link with -lm.

DESCRIPTION The creal() function returns the real part of the complex number z.

One has:

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

VERSIONS These functions first appeared in glibc in version 2.1.


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

SEE ALSO cabs(3), cimag(3), complex(7)

COLOPHON This page is part of release 3.22 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at

2008-08-11 CREAL(3)