How do I use default parameters in Python?

How do I use default parameters in Python?

In Python, you can set default parameters in a function by assigning a value to the parameter in the function definition.

Can you give me an example?

Sure! Here's a simple example:

def greet(name, greeting='Hello'):
    return f'{greeting}, {name}!'

In this case, if you call greet('Alice'), it will return 'Hello, Alice!'. If you call greet('Alice', 'Hi'), it will return 'Hi, Alice!'.

What happens if I don't provide a value for the default parameter?

If you don't provide a value for the default parameter, Python will use the default value specified in the function definition.

Can I use mutable types as default parameters?

It's generally not recommended to use mutable types like lists or dictionaries as default parameters because they can retain changes between function calls.