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Why Doesn’t Decimal Work with Float in python?

📺 https://youtu.be/gfLe4fI5VX0

#!/usr/bin/env python3
from decimal import *
a=Decimal(1000000000000000000000000000000000000.0)
print(a)  # y is this value so different?
b=1000000000000000.0
print(a-b)

There are several problems with this related to the way Python handles numbers.

1. The biggest integer you can create is 2^64-1 (18446744073709551616).
2. Decimal() is a class constructor that takes a string counter-intuitively.
3. Decimal type is not strictly a number.

The Decimal type gets around the problem of dealing with very large numbers that cannot be accurately represented by computers with a maximum of 2^64-1 but when you use it, you have to use it for everything.

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