If you're using the terminal, I recommend using IPython, as it has a lot of features to make interactive use easier and it's the basis for using Python in Jupyter.

A common joke among Python programmers is that the interactive mode works great as a desk calculator. Here are the reasons this is close to reality.

What is Python? This post answers that question and walks you through the basics. Set up a coding environment and build your first simple app!

Learn how to make a game in Python using the popular Pygame. You'll learn how to handle player inputs, draw graphics, and more.

However, it is very difficult to develop a calculator that can display accurate answers, and as an example, engineer Chad Nauseam explains how the 'Calculator' app installed on Android was developed.