I'm trying to wrap my head around the difference between iterative and recursive functions, and I'm struggling to understand the concept of a recursive function 'calling itself.' When people say that, what do they actually mean? Could someone break this down in simple terms? Thanks!
1 Answer
A recursive function simply means that in its definition, it has the ability to call itself. For example, in Python, you might define a function that counts up from a number, like this:
```python
def count_up(n):
print(n)
count_up(n + 1)
```
Here, `count_up` is calling itself with an incremented value of `n`. It keeps going until you stop it, which is why you need some condition to prevent it from going infinitely!
Got it! So when you say it 'calls itself,' it's like the function is saying, 'Hey, let's keep doing this over and over with a new number until we hit a stop? Cool, thanks for explaining!