How to Import Libraries like Numpy

[ajay3adhikari]

I am a beginner in Python. I downloaded Python on my mac and started Python 3.7.3 Shell.
Though I imported 'math' library as 'import math', I am not being able to import 'Numpy' and others.

Input text: >>> import Numpy as np


Error message:

Error:
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    import Numpy as np
ModuleNotFoundError: No module named 'Numpy'

Could anyone please advise how to import libraries?
Thanx.