Functions

A function is reusable code that provides instructions for performing an action, such as Dance() or Sleep(), and produces different outputs based on the input you provide.

A function is reusable code that provides instructions for performing an action, such as Dance() or Sleep(), and produces different outputs based on the input you provide.

Functions provide abstraction for behaviors, which means that these reusable functions hide the implementation details that aren't relevant for other parts of your code and that you don't need to see.

Let's use ordering food from a menu as an example for functions and abstraction. The function for ordering food could look something like this:

OrderFood(MenuItem : string) : food = {...}
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When you order food at a restaurant, you tell the waiter which dish on the menu you want,OrderFood("Ramen"). You don't know how the restaurant will prepare your dish, but you expect to receive something that's considered a food after ordering. Other customers can order different dishes from the menu and also expect to receive their food.