What are optional parameters in Python?

What are optional parameters in Python?

Optional parameters in Python allow you to define functions that can be called with fewer arguments than defined. They have default values.

Can you give me an example of a function with optional parameters?

Sure! Here's a simple example:

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

In this function, 'greeting' is an optional parameter.

What happens if I don't provide the optional parameter?

If you don't provide the optional parameter, the function uses the default value. For example, greet('Alice') returns 'Hello, Alice!'.

Can I override the default value?

Yes, you can override it by providing a value when calling the function, like greet('Alice', 'Hi'), which returns 'Hi, Alice!'.