Hello World! Third Edition

Chapter 7. Decisions, Decisions

In the first few chapters, we saw some of the basic building blocks of a program. We can now make a program with input, processing, and output. We can even make our input and output a little fancier by using a GUI. We can assign the input to a variable, so we can use it later, and we can use some math to process it. Now we’re going to start looking at ways to control what the program does.

If a program did the same thing every time, it would be a little boring and not very useful. Programs need to be able to make decisions on what to do. We’re going to add some different decision-making techniques to our processing repertoire.

Testing, testing

Programs need to be able to do different things based on their input. ...