Chapter 9. Classes and Structures

Until now, we've mostly talked about working with predefined types, such as Integer or String . However, it is often convenient to define new data types that represent more complex concepts than just numbers or strings. When we are writing an order-tracking program, for example, it may be convenient to define a type that represents a customer. The customer type would include information about each customer who has opened an order: the customer's name , the customer's address, the customer's phone number, and so on.

This chapter discusses classes and structures that can be used to define just these kinds of types.