What does the 'raise' keyword do in Python?

What does the 'raise' keyword do in Python?

The 'raise' keyword in Python is used to trigger an exception. You can raise built-in exceptions or create your own.

Can you give me an example of how to use 'raise'?

Sure! Here's a simple example:

def check_age(age):
    if age < 18:
        raise ValueError('Age must be 18 or older')

This function raises a ValueError if the age is less than 18.

What happens if I don't handle the exception?

If you don't handle the exception, it will propagate up the call stack and terminate the program, displaying an error message.

Can I create my own custom exceptions?

Yes, you can create custom exceptions by subclassing the built-in Exception class. Here's an example:

class MyCustomError(Exception):
    pass