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Calculate Factorial Using Recursion

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A Python program to compute the factorial of a number using recursion.

Function Definition:
- factorial(n) is defined to calculate the factorial using recursion.
Base Case Check:
- If n == 0 or n == 1, return 1 (factorial of 0 and 1 is always 1).
Recursive Case:
- Returns n * factorial(n - 1), repeatedly calling itself.
User Input:
- Takes a number (num) as input and converts it to an integer.
Function Call & Output:
- Calls factorial(num) and prints the result.
Recursive Execution:
- The function continues calling itself until n == 1, then returns the computed factorial step-by-step.

Program:

def factorial(n):

    if n == 0 or n == 1:

        return 1  

    else:

        return n * factorial(n - 1)  



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

print(f"Factorial of {num} is:", factorial(num))

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Calculate Factorial Using Recursion

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