What are default values for function parameters in Python?

What are default values for function parameters in Python?

Default values for function parameters allow you to define a value that will be used if no argument is provided when the function is called.

Can you give me an example of how to use default values?

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 a parameter without a default?

If you don't provide a value for a parameter that doesn't have a default, Python will raise a TypeError indicating that a required positional argument is missing.

Are there any limitations to using default values?

Yes, one limitation is that all parameters with default values must be placed after any parameters without default values in the function definition.