creal(3)                                              Library Functions Manual                                             creal(3)

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

LIBRARY
       Math library (libm, -lm)

SYNOPSIS
       #include <complex.h>

       double creal(double complex z);
       float crealf(float complex z);
       long double creall(long double complex z);

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

       One has:

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

VERSIONS
       These functions were added in glibc 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 │
       └─────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS
       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)

Linux man-pages 6.03                                         2022-12-15                                                    creal(3)