creal(3) - f34

1CREAL(3)                   Linux Programmer's Manual                  CREAL(3)
2
3
4

NAME

6       creal, crealf, creall - get real part of a complex number
7

SYNOPSIS

9       #include <complex.h>
10
11       double creal(double complex z);
12       float crealf(float complex z);
13       long double creall(long double complex z);
14
15       Link with -lm.
16

DESCRIPTION

18       These functions return the real part of the complex number z.
19
20       One has:
21
22           z = creal(z) + I * cimag(z)
23

VERSIONS

25       These functions first appeared in glibc in version 2.1.
26

ATTRIBUTES

28       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
29       tributes(7).
30
31       ┌────────────────────────────┬───────────────┬─────────┐
32       │Interface                   │ Attribute     │ Value   │
33       ├────────────────────────────┼───────────────┼─────────┤
34       │creal(), crealf(), creall() │ Thread safety │ MT-Safe │
35       └────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

37       C99, POSIX.1-2001, POSIX.1-2008.
38

NOTES

40       The gcc supports also __real__.  That is a GNU extension.
41

COLOPHON

46       This page is part of release 5.10 of the Linux  man-pages  project.   A
47       description  of  the project, information about reporting bugs, and the
48       latest    version    of    this    page,    can     be     found     at
49       https://www.kernel.org/doc/man-pages/.
50
51
52
53                                  2015-04-19                          CREAL(3)