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CREAL

Section: Linux Programmer's Manual (3)
Updated: 2015-03-02
Index Return to Main Contents
 

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

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
creal(), crealf(), creall() Thread safetyMT-Safe
 

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 3.81 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

NAME
SYNOPSIS
DESCRIPTION
VERSIONS
ATTRIBUTES
CONFORMING TO
NOTES
SEE ALSO
COLOPHON


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