Function for Factorial in Python

Question

How do I go about computing factorial of an integer in Python?

Answer 1

There are many ways to calculate factorial in Python:-

The first thing you can do is as follows:-

def factorial(n):

  return reduce(lambda x,y:x*y,[1]+range(1,n+1))

Another way would be as follows:-

def factorial(n): 

  if n == 0: 

    return 1 

  else: 

    return n * factorial(n-1)

To know more about this you can have a look at the following video tutorial:-