Factorial Program in Python

Written by

Himani Kohli

Program to find factorial in Python

Here, we are going to learn how to get the factorial of a number and display it.

Factorial of a positive integer is the multiplication of all integers smaller than or equal to n.

It is represented as n*(n-1)*(n-2)………….1

Example: 4! = 4*3*2*1 =24

Algorithm:

1. Input the number from user.
2. Initialise the product variable to 1.
3. Use the for loop ranging from 1 till n+1 in order to multiply and find the factorial.
4. Print the factorial of the number.
5. Exit

Code:

n= int(input("Enter the number you want to find the factorial of: "))
prod=1
for i in range(1,n+1):
prod=prod*i
print(prod)

Output:

Enter the number you want to find the factorial of: 5
120