creal(3) - f35

1CREAL(3)                   Linux Programmer's Manual                  CREAL(3)
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NAME

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

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

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

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

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

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

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

47       This page is part of release 5.12 of the Linux  man-pages  project.   A
48       description  of  the project, information about reporting bugs, and the
49       latest    version    of    this    page,    can     be     found     at
50       https://www.kernel.org/doc/man-pages/.
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54                                  2021-03-22                          CREAL(3)