In this chapter, we take a look at the basic data types and describe some fundamental rules for forming arithmetic expressions in Objective-C.
You have already encountered the Objective-C basic data type
int. As you will recall, a variable declared to be of type
int can be used to contain integral values only—that is, values that do not contain decimal digits.
The Objective-C programming language provides three other basic data types:
char. A variable declared to be of type
float can be used for storing floating-point numbers (values containing decimal digits). The
double type is the same as type
float, typically with roughly twice the range. Finally, the