cimag(3) Library Functions Manual cimag(3)

cimag, cimagf, cimagl - get imaginary part of a complex number

Math library (libm, -lm)

#include <complex.h>
double cimag(double complex z);
float cimagf(float complex z);
long double cimagl(long double complex z);

These functions return the imaginary 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
cimag (), cimagf (), cimagl () Thread safety MT-Safe

GCC also supports __imag__. That is a GNU extension.

C11, POSIX.1-2008.

glibc 2.1. C99, POSIX.1-2001.

cabs(3), creal(3), complex(7)

2023-10-31 Linux man-pages 6.7