Now we’ll walk through some code step-by-step, so you can learn about the important pieces. As you read, enter the examples, and we’ll explain how to run them and modify them. But don’t stop there: experiment to give your programs a personal touch. We’ve included exercises at the end of each section to help you become a programming master (like a Jedi, but without the dangerous lightsabers). Try out the exercises to hone your skills.