Complex number determination

How can I check if a number is imaginary? I want to set an if function, that if a variable is an aimginary number then something will happen.

Answer 1

[Andrei Bobrov]

z - your number

out = imag(z) ~= 0;

if out = true, then z - complex number

OR

out = isreal(z)

if out = false, then z - complex number