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12-control-statements

12-control-statements - Steve Cooper CS 106A Handout#12...

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Steve Cooper Handout #12 CS 106A January 14, 2010 Control Statements Based on a handout by Eric Roberts This handout offers some additional notes on Java’s control statements (described more fully in Chapter 4 of the textbook) that emphasize the important concepts. It also describes a programming problem making use of various control structures. To write programs, you need to understand control statements from two perspectives: you must have a holistic sense of when to use them and why, but you must also learn to understand the reductionistic details. For this big-picture perspective, you can rely to a large extent on your experience from Karel: If you want to test a condition that requires an if statement in Karel, you need the if statement in Java. If you would use the while or for statement in Karel, you will presumably use the same statement form in Java. The other holistic point that is essential about control statements is that the control line is conceptually independent from the body. Thus, if you see a construct like for (int i = 0; i < 10; i++) { Control line statements Body } the statements in the body will be repeated for each of the values of i from 0 to 9. It doesn’t matter at all what those statements are.
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