summary writing programs is only the first part of programming the next part is making sure the code you wrote actually works debuggers let you step through the code one line at time you can examine which lines execute in what orderand what values the variables contain when this is too slowyou can set break points to stop the debugger only at the lines you want using the debugger is great way to understand what program is doing while this book provides explanations of all the game code in itthe debugger can help you find out more on your own post questions to