As you begin to work with classes and objects, you may come across the term black box programming. Often times, programmers write methods as if they were black boxes — the programmer knows what is going on inside the box, but all of those implementation details are hidden from the user. The user should be aware of the input of the black box, and they should be able to predict an output given the input, but the details of how that input gets transformed into the output can be hidden from the users.