In Python, a function is a reusable block of code that performs a specific action. It can accept input values, known as parameters, and can also return a value as a result. Functions help to break down complex problems into simpler, manageable tasks, making the code more readable and maintainable.

Defining and Calling Functions

To define a function in Python, you use the def keyword followed by the function name and parentheses. Here's a basic example of defining and calling a function:

Parameters and Arguments

Functions can take parameters, which are variables listed inside the parentheses in the function definition. When a function is called, you can pass values known as arguments, which correspond to the parameters defined in the function. Here's an example with parameters and arguments: