The programs you’ve written so far are short and easy to understand. But as you start dealing with more complex problems, you’ll need to write longer programs. Understanding long programs can be a challenge, because you’ll need to keep track of many different parts of the program. In this chapter, you’ll learn how to organize your programs into smaller pieces.

An approach known as structured programming started in the mid-1960s to simplify the process of writing, understanding, and maintaining computer programs. Instead of writing a single, large program, you divide your program into smaller pieces. Each piece ...

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