creal(3) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ATTRIBUTES | VERSIONS | STANDARDS | HISTORY | SEE ALSO

creal(3)                Library Functions Manual                creal(3)

NAME         top

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

LIBRARY         top

       Math library (libm, -lm)

SYNOPSIS         top

       #include <complex.h>

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

DESCRIPTION         top

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

       One has:

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

ATTRIBUTES         top

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

VERSIONS         top

       GCC supports also __real__.  That is a GNU extension.

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       glibc 2.1.  C99, POSIX.1-2001.

SEE ALSO         top

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

Linux man-pages (unreleased)     (date)                         creal(3)

Pages that refer to this page: cimag(3)complex(7)