CREAL

Section: Linux Programmer's Manual (3)
Updated: 2013-09-18
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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.

ATTRIBUTES

Multithreading (see pthreads(7))

The creal(), crealf(), and creall() functions are thread-safe.

CONFORMING TO

C99.

NOTES

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

COLOPHON

This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.

Index

Multithreading (see pthreads(7))