Functions of Python

Define a function with a def statement.

function return value with return.

If there is no return, the result of the function return is None

Two, the Python function returns multiple values.

Essence: The function returns a value that is still a tuple. This is because, in syntax, the returned tuple can omit parentheses, and multiple variables can receive a tuple at the same time, assigning values to the corresponding values by location.

Third, default parameters

Four, variable parameters

Variable parameter has a * number in front of the name

You can think of mutable parameters as a tuple.

Functions of Python