5. Numbers

One of the big differences between Objective-C and Smalltalk is that Objective-C inherits the full range of primitive (non-object) C types. These are, in ascending order of size, char, short, int, long and long long integers, with both signed and unsigned variants, as well as two floating-point types: float and double.

These all behave exactly as they do in C, complete with type promotion rules. You’ll also find that Objective-C compilers support a long double type, which is architecture-dependent.

Note that this is very similar to Java, where you have a small selection of non-object types, but with some very important differences. In Java, the intrinsic types are defined to be a fixed size. In C, they are defined to have a minimum ...

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