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

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ creal(), crealf(), creall()                                                 │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       These functions return the real part of the complex number z.

       One has:

           z = creal(z) + I * cimag(z)

       glibc 2.1.  C99, POSIX.1-2001.

       Math library (libm, -lm)

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

cabs(3), cimag(3), complex(7)

Linux man-pages 6.9.1                              2024-05-02                                           creal(3)

       C11, POSIX.1-2008.

#include<complex.h>doublecreal(doublecomplexz);floatcrealf(floatcomplexz);longdoublecreall(longdoublecomplexz);

       GCC supports also __real__.  That is a GNU extension.