Chapter 6. program flow
Program flow is all about controlling the order in which the blocks in your program are run. As you can imagine, controlling the order of your blocks is as important as setting their configuration. The parts of a programming language that control the program flow are often called programming structures, and NXT-G has three: the Sequence Beam, the Switch block, and the Loop block.
In this chapter, I’ll cover the Switch and Loop blocks in depth and show you how to use them effectively, filling in the details I glossed over in the previous chapters. A few other blocks are also used to control how your program runs. You have already seen the Wait block, and I’ll cover the Keep Alive and End blocks in this chapter.
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