How do I use the 'in' keyword in Python?
An example of an AI chatbot conversation about using the 'in' keyword in Python.
How do I use the 'in' keyword in Python?
The 'in' keyword in Python is used to check if a value exists within an iterable, like a list or a string.
Can you give me an example of using 'in' with a list?
Sure! For example, you can check if a number is in a list like this: if 3 in [1, 2, 3, 4]: print('Found!').
What about using 'in' with strings?
You can use 'in' to check for substrings. For instance, 'cat' in 'concatenate' will return True.
Are there any performance considerations when using 'in'?
Yes, using 'in' with lists has O(n) complexity, while with sets and dictionaries, it has O(1) complexity.
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