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creal(3) Library Functions Manual creal(3)
creal, crealf, creall - get real part of a complex number
Math library (libm, -lm)
#include <complex.h> double creal(double complex z); float crealf(float complex z); long double creall(long double complex z);
These functions return the real part of the complex number z. One has: z = creal(z) + I * cimag(z)
For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │creal(), crealf(), creall() │ Thread safety │ MT-Safe │ └──────────────────────────────────────┴───────────────┴─────────┘
GCC supports also __real__. That is a GNU extension.
C11, POSIX.1-2008.
glibc 2.1. C99, POSIX.1-2001.
cabs(3), cimag(3), complex(7)
Linux man-pages 6.04 2023-03-30 creal(3)
Pages that refer to this page: cimag(3), complex(7)