Recursive Factorial Calculation

This function calculates the factorial of a non-negative integer. Factorial is a basic operation in mathematics, represented as n!, which means n multiplied by (n-1) multiplied by (n-2) and so on down to 1. A recursive function is a method of solving problems by calling the function itself within the function.

Technology Stack : Built-in library

Code Type : Recursive function

Code Difficulty : Intermediate

                
                    
def factorial(n, accumulator=1):
    if n < 0:
        return None
    if n == 0:
        return accumulator
    return factorial(n-1, n * accumulator)