Thonny is an IDE that comes packaged with Raspbian. With Thonny, we may evaluate expressions by using the debug function. Thonny is also available for macOS and Windows.

To load Thonny, go to Application Menu | Programming | Thonny:

Above is the default screen for Thonny. Panels to view variables in your program, as well as a panel to view the filesystem, are toggled on and off from the View menu. Thonny's compact structure makes it ideal for our projects.

We will be learning a bit more about Thonny as we go through the rest of this book.