Linux.com

crealf.3

CREAL

Section: Linux Programmer's Manual (3)
Updated: 2008-08-11
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.  

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 3.21 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/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
VERSIONS
CONFORMING TO
NOTES
SEE ALSO
COLOPHON

 

Comments

Subscribe to Comments Feed

Upcoming Linux Foundation Courses

  1. LFS426 Linux Performance Tuning
    08 Sep » 11 Sep - New York
    Details
  2. LFS520 OpenStack Cloud Architecture and Deployment
    08 Sep » 11 Sep - Virtual
    Details
  3. LFD320 Linux Kernel Internals and Debugging
    15 Sep » 19 Sep - Virtual
    Details

View All Upcoming Courses

Become an Individual Member
Check out the Friday Funnies

Sign Up For the Linux.com Newsletter


Who we are ?

The Linux Foundation is a non-profit consortium dedicated to the growth of Linux.

More About the foundation...

Frequent Questions

Join / Linux Training / Board