Numpy rounds very small number to zeros - Markov Chain Python

Question

While using the numpy module for Markov Chain, I saw that very tiny float values are getting converted to zero. Why is that happening?

Answer 1

Use higher-precision floats, if available on your system. For example, if you have float128:

import numpy as np
print(np.exp(np.float128(-1000))) 
print(np.exp(np.float128(-10000)))