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.

CONFORMING TO¶

C99.

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 http://www.kernel.org/doc/man-pages/.