Chapter 11. Iteration and flow control

This chapter deals with the basic issue of iteration (looping) and flow control in C#.

Like Java

• In C#, the while (in while loops ), do and while (in do...while loops), and for (in for loops) keywords work in exactly the same way as in Java.

• You can break and continue from within loops to terminate iteration prematurely (except that you cannot use them with labels).

Unlike Java

Flow control in C# is very much the same as Java, except for:

• a new and useful foreach keyword;

• some changes to how switch-case is used;

• C# retains the goto keyword; ^[1]

  ^[1] goto is a reserved word in Java, but has no functionality. The usage of goto in C/C++ has often been criticized as poor structural programming. Use it with care in C#.

• you cannot use break and continue with labels.

Short examples are given showing while / do...while / for loops and the use of continue and break , but they will not be described in detail because they are used the same way in Java. The later sections emphasize the new stuff that came with C#.