how to calculate n factorial in python code example

Example 1: python calculate factorial

def factorial(n):
    fact = 1
    for num in range(2, n + 1):
        fact = fact * num
    return(fact)

Example 2: Find faculty of a number python

#Assumes n is possitive
def factorial(n):
  return 1 if n <=1 else n*factorial(n-1)