Python string find() examples

I'm looking for examples, but I'm not finding any.
Are there any examples on the internet? I'd like to know what it returns when it can't find something, as well as how to specify the starting and ending points, which I assume will be 0, -1.

Code:

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>>> x = "Hello World"
>>> x.find('World')
6
>>> x.find('Aloha');
-1

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Could you please help me? But I'm not convinced.

https://realpython.com/
https://www.tutorialsteacher.com/python
https://docs.python.org/3.8/library/...#library-index

Are all great Python references that would help you with what you're looking for.

Q: I'd like to know what it returns when it can't find something
A: You can see it in your output with -1 since Aloha is not present in the string at all.

Q: how to specify the starting and ending points
A: It will find the whole string you put inside find function in variable x.