The factorial of a number is the product of all the integers from 1 to that number.
For example, the factorial of 6 is
1*2*3*4*5*6 = 720. Factorial is not defined for negative numbers and the factorial of zero is one, 0! = 1.
# Factorial of a number using recursion def recur_factorial(n): if n == 1: return n else: return n*recur_factorial(n-1) num = 7 # check if the number is negative if num < 0: print("Sorry, factorial does not exist for negative numbers") elif num == 0: print("The factorial of 0 is 1") else: print("The factorial of", num, "is", recur_factorial(num))
The factorial of 7 is 5040
Note: To find the factorial of another number, change the value of
Here, the number is stored in
num. The number is passed to the
recur_factorial() function to compute the factorial of the number.