How to use Numpy

"""
# Python DataTypes

strings
: "Hello World"

integer
: -2, 0, 1, 2

float
: 1.2, 3.4

boolean
: True, False

complex
: 1.0 + 2.0j, 1.5 + 2.5j
"""

""" 
# Numpy DataTypes

s : string
i : integer
b : boolean
u : unsigned integer
f : float
c : complex
m : timedelta
M : datetime
O : object
U : unicode string
V : void
"""

"""
# How to CHECK & CONVERT array datatypes for Numpy

import numpy as np

arr = np.array([1, 2, 3, 4])
print(arr.dtype)    # int32
#-> Depend on system env / 32, 64

f_arr = arr.astype("f") #("float32")
print(f_arr.dtype)
"""