How does NumPy implement its complex number literal?

Question

Using complex number in Numpy is as simple as np.exp(1+ 2.3j). How to implement this simple notation? What is 2.3j? It's not like that it is a variable name.

Answer 1

Complex numbers are a built-in data type in Python.

You can do complex number operations right inside the interpreter without numpy if you like:

>> (2+3j) * (-1j)
(3-2j)