1creal(3)                   Library Functions Manual                   creal(3)
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NAME

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

9       Math library (libm, -lm)
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SYNOPSIS

12       #include <complex.h>
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14       double creal(double complex z);
15       float crealf(float complex z);
16       long double creall(long double complex z);
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DESCRIPTION

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

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

36       GCC supports also __real__.  That is a GNU extension.
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STANDARDS

39       C11, POSIX.1-2008.
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HISTORY

42       glibc 2.1.  C99, POSIX.1-2001.
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SEE ALSO

45       cabs(3), cimag(3), complex(7)
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49Linux man-pages 6.05              2023-07-20                          creal(3)