Variadic parameters are useful when you want to create a function that can take any number of arguments of a specific type without specifying them individually.
If there are multiple pieces of data that are logically related to each other, it makes sense to group them together and return them as a single unit.
One way is to use the arguments object, the other is to use the rest parameter syntax.
In summary *args collects the extra positional arguments as a tuple, while **kwargs collects the extra keyword arguments as a dictionary.
A recursive function typically has a base case that stops the recursion and one or more recursive cases that call the function itself.