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- Thread starter Natali
- Start date

Hey everyone, I'm relatively new to Python and I've been trying to wrap my head around recursion. I'm working on a function to calculate factorial numbers, but I keep running into a "maximum recursion depth exceeded" error. Here's my code:

Hi, Natali! I see the issue. In your recursive call, you're not reducing the problem size. The function keeps calling itself with the same value of n indefinitely. Try decrementing n in the recursive call like this:

Python:

`return n * factorial(n - 1)`

@Madi is spot on. Also, don't forget to handle the case when n is 0. The factorial of 0 is 1, so you should include that in your base case to avoid errors.Hi, Natali! I see the issue. In your recursive call, you're not reducing the problem size. The function keeps calling itself with the same value of n indefinitely. Try decrementing n in the recursive call like this:

Python:`return n * factorial(n - 1)`

Python:

```
if n == 0:
return 1
```

Python:

```
if not isinstance(n, int) or n < 0:
raise ValueError("Input must be a non-negative integer")
```

Hey, recursion can be tricky! Your error might be because your base case isn't properly defined. Remember, every recursive function needs a base case to stop the infinite loop. For factorials, your base case should be when n equals 1 or 0.

UPD: Oops, looks like I jumped the gun with my advice. Just realized that the original poster already found a solution to the recursion problem. My bad for not reading the thread thoroughly. Glad to hear the issue was sorted out!

UPD: Oops, looks like I jumped the gun with my advice. Just realized that the original poster already found a solution to the recursion problem. My bad for not reading the thread thoroughly. Glad to hear the issue was sorted out!

Last edited:

No worries! Appreciate you chiming in. It's all about sharing knowledge and experiences, right? Every bit of input is valuable, especially in tricky areas like recursion. Thanks for taking the time to contribute!