Chapter 4. Language and Programming Basics
In This Chapter
Getting a handle on statements
Working with variables
Performing actions with operators
Knowing how to make logical decisions in your code
Using pointers to access data
Getting the hang of using constants
Being aware of the Objective-C reserved words
As I mention in Chapter 3, Objective-C is a set of extensions to standard ANSI C. This means that at some point (that is, this chapter), you'll have to sit down and learn the basics of the C instruction set, along with some less than inspiring examples and detailed explanations on the basics of the language — kind of like learning your alphabet. I know all this can be tedious and excruciatingly boring, although when you're just starting out there's no other way (we all have to pay our dues at some point). But once you are done with this chapter, you will switch to learning Objective-C by developing a "real world" application, which I promise is (for the most part) much more interesting. So hang in there.
It All Comes Down to Your Statements
At the end of the day, it's all about the instructions you give the computer. Those instructions are called statements. You can easily recognize a statement because it ends with a semicolon, as shown here:
NSLog(@"This is a statement");
There are a number of different kinds of statements. In this chapter, I show you two of them:
Declarations of a variable allow space for data. They look something like this:
Declarations are used to allocate ...