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NAME

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

SYNOPSIS

       #include <complex.h>

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

       Link with -lm.

DESCRIPTION

       The creal() function returns the real part of the complex number z.

       One has:

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

VERSIONS

       These functions first appeared in glibc in version 2.1.

CONFORMING TO

       C99.

NOTES

       The gcc supports also __real__.  That is a GNU extension.

SEE ALSO

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

COLOPHON

       This  page  is  part of release 3.24 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

                                  2008-08-11                          CREAL(3)