In JavaScript, a function is a reusable block of code designed to perform a particular task. 🎯

Functions help organize code, reduce repetition, and make debugging easier. They are essential in any JavaScript application.

Here's a simple example showing how functions work:

This type of function does not take any input. It performs a fixed action every time it's called.

This function accepts one or more values (arguments) as input and uses them inside the block.

JavaScript allows you to assign default values to parameters. If no value is passed, the default is used.

This function processes input and returns a result using the return statement.