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)

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌───────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │Interface                                                      │ Attribute     │ Value   │
       ├───────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │creal(), crealf(), creall()                                    │ Thread safety │ MT-Safe │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

VERSIONS

       GCC supports also __real__.  That is a GNU extension.

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       glibc 2.1.  C99, POSIX.1-2001.

SEE ALSO

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