C# is a strongly typed language. That means that every object you create or use in a C# program must have a specific type. In other words, you must declare the object to be an integer or a string or a
Dog or a
Button. Essentially, the type indicates the characteristics of the object and what it can do.
Types come in two flavors: those that are built into the language (intrinsic types) and those you create yourself (classes and interfaces, discussed in Chapters Chapter 7 and Chapter 13). C# offers a number of intrinsic types, shown in Table 3-1.
Table 3-1. The intrinsic types built into C#
Size (in bytes)
Unsigned (values between 0 and 255).
Unicode characters (a modern way of storing most characters, including international language characters).
True or false.
Signed (values between –128 and 127).
Signed (short) (values between –32,768 and 32,767).
Unsigned (short) (values between 0 and 65,535).
Signed integer values between –2,147,483,648 and 2,147,483,647.
Unsigned integer values between 0 and 4,294,967,295.
Floating-point number. Holds the values from approximately +/-1.5 x 10-45 to approximately +/-3.4 x 1038 with seven significant figures.
Double-precision floating-point. Holds the values from approximately +/-5.0 x 10-324 to approximately +/-1.8 x 10308 with 15 to 16 significant figures.
Fixed-precision up to 28 digits and the position ...