Python Program to Find Factorial of Number Using Loop

Here you will get python program to find factorial of number using for and while loop.

Factorial of a number is calculated by multiplying it with all the numbers below it starting from 1.

For example factorial of 4 is 24 (1 x 2 x 3 x 4).

Below program takes a number from user as an input and find its factorial.

Python Program to Find Factorial of Number

Using For Loop

Output

enter a number: 5
factorial of 5 is 120

Using While Loop

Output

enter a number: 4
factorial of 4 is 24

Comment below if you have any queries related to above python factorial program.


3 thoughts on “Python Program to Find Factorial of Number Using Loop

    1. Admin Post author

      Because range(start, end) function will generate numbers from start and end-1. In above program we want to generate numbers from 1 to num, I have used num+1 that means (num+1)-1 which ultimately means num.

      Reply
  1. deepak

    def factorial(a):
    result=1
    for i in range(1,a+1):
    result= result*i
    return result
    a = input(‘ur number please ‘)
    y = (factorial(a))
    print(y + str (‘is ur answer’))
    can any body tell me where is the problem

    Reply

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