Factorial Program in Python using Function

Learn about Factorial Program in Python using Function in the below code example. Also, refer to the comments in the code snippet to get a detailed view about what’s actually happening.

Factorial Program in Python using Function

The below code prints the factorial of the number using a User-defined Function in python.

# Python program to find the factorial of a number using function

#user-defined function
def factorial(num):  
    fact = 1
    for i in range(1,num + 1):
       fact = fact*i
    return fact

# input
num = int(input("Enter number: "))

# check number is positive, negative, or zero
if num < 0:
   print('Factorial does not exist for negative numbers')
elif num == 0:
   print('The factorial of 0 is 1')
else:
    # function call
    print('The factorial of',num,'is',factorial(num))

Output:

Enter number: 6
The factorial of 6 is 720

Hope above code works for you and Refer the below Related Codes to gain more insights. Happy coding and come back again.