Objective-C Fundamentals

Chapter 2. Data types, variables, and constants

 

This chapter covers

• Storing numeric-, logic-, and text-based data
• Creating your own data types
• Converting values between different data types
• Formatting values for presentation
• Introducing the Rental Manager sample application

 

Virtually every application needs to store, represent, or process data of some kind, whether a list of calendar appointments, the current weather conditions in New York, or the high scores of a game.

Because Objective-C is a statically typed language, whenever you declare a variable, you must also specify the type of data you expect to store in it. As an example, the following variable declaration declares a variable named zombieCount, which is of type int:

int ...