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Lesson 20. Building programs to last

After reading lesson 20, you’ll be able to

• Understand how a bigger task is divided into modules
• Understand why you should hide away details of complicated tasks
• Understand what it means for tasks to be dependent on or independent of other tasks

You saw how useful loops are at getting the computer to repeat a certain group of statements many times. As you’re writing code, it’s important to be aware of how you can harness the power of computers to make life easier for you. In this lesson, you’ll take this idea a step further to see how to divide a larger program into smaller mini-programs, each one constructed to achieve a specific task.

For example, if you think about the process of building a car as a large ...