By Jesse Liberty
Read or Download Programming C# : "Building .NET applications"--Cover. - "Updated for VS.NET 1.0"--Cover. - Includes index PDF
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Extra resources for Programming C# : "Building .NET applications"--Cover. - "Updated for VS.NET 1.0"--Cover. - Includes index
You can only "fall through" in this way if there is no body within the statement. If you uncomment the WriteLine under LiberalRepublican, this program will not compile. 43 Programming C#, 2nd Edition C and C++ programmers take note: you cannot fall through to the next case if the case statement is not empty. Thus, you can write the following: case 1: // fall through ok case 2: In this example, case 1 is empty. You cannot, however, write the following: case 1: TakeSomeAction( ); // fall through not OK case 2: Here case 1 has a statement in it, and you cannot fall through.
In addition, C# supports the goto, break , continue, and return jump statements. 1 The goto statement The goto statement is the seed from which all other iteration statements have been germinated. Unfortunately, it is a semolina seed, producer of spaghetti code and endless confusion. Most experienced programmers properly shun the goto statement, but in the interest of completeness, here's how you use it: 1. Create a label. 2. goto that label. The label is an identifier followed by a colon. The goto command is typically tied to a condition, as illustrated in Example 3-10.
For example: int x; // a statement x = 23; // another statement int y = x; // yet another statement C# statements are evaluated in order. The compiler starts at the beginning of a statement list and makes its way to the bottom. This would be entirely straightforward, and terribly limiting, were it not for branching. There are two types of branches in a C# program: unconditional branching and conditional branching. Program flow is also affected by looping and iteration statements, which are signaled by the keywords for , while, do, in, and foreach.