The imaginary part of the complex number $z$.
The following example defines a complex number $z$ and prints its imaginary part
-- z.Im
z=3+2*I
print("The imaginary part of z = ",z," is ",z.Im)
z.Im = -2
print("The imaginary part of z = ",z," is ",z.Im)
The imaginary part of z = (3+2 I) is 2 The imaginary part of z = (3-2 I) is -2