How this code works?

Question

If I input 0 to this fact function . The answer is 1.
But why the for loop is not working for this ? Explain.
https://code.sololearn.com/c9LQlk13lc69/?ref=app

Answer 1

When n is 0, it will be range(1, 1).

The start and the end is the same and thus the loop doesn't run.

Answer 2

I don't understand your question.
You don't need the 'if' statement, just a single 'fact = 1', i.e. delete lines 2 and 3.
The for loop is working. In the case of n = 0, it runs from 1 to 1.

Answer 3

Thanks friends.