In this Program Tutorial, you’ll learn how to find the factorial of a number using recursion

To understand this program to Find Factorial of a Number Using Recursion, you should have the knowledge of following Python programming topics:

- Python if…else Statement
- Python Functions
- Python Recursion

The factorial of a number is the product of all the integers from 1 to that number.

**For example**, the factorial of 6 (denoted as 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.

#### Program to find the factorial of a number using recursion

# Python program to find the factorial of a number using recursion def recur_factorial(n): """Function to return the factorial of a number using recursion""" if n == 1: return n else: return n*recur_factorial(n-1) # Change this value for a different result num = 7 # uncomment to take input from the user #num = int(input("Enter a number: ")) # check is 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))

**Output**

The factorial of 7 is 5040

**Note:** You can change the value of `num`

to check this program.

Here, in the program number is stored in `num`

and use a recursive function `recur_factorial()`

to compute the product up to that number.

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