Manpages - creal.3

Table of 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

These functions return 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).

Interface Attribute Value
*creal*(), *crealf*(), *creall*() Thread safety MT-Safe

CONFORMING TO

C99, POSIX.1-2001, POSIX.1-2008.

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 5.13 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 https://www.kernel.org/doc/man-pages/.

Author: dt

Created: 2022-02-20 Sun 14:38