A lot of beginner tutorials start with “Hello World” examples. There are plenty of websites that use a calculator application as a kind of “Hello World” for GUI beginners. Calculators are a good way to learn because they have a set of widgets that you need to lay out in an orderly fashion. They also require a certain amount of logic to make them work correctly. For this calculator, let’s focus on being able to do the following:
- Addition
- Subtraction
- Multiplication
- Division
I think that supporting these four functions is a great starting place and also give you plenty of room for enhancing the application on your own.