Python Calculator App

A simple command-line calculator implemented in Python. Supports addition, subtraction, multiplication, and division.

Usage

python main.py

Enter expressions like 3 + 4 or 10 / 2. Type quit to exit.

GUI Mode

A graphical interface resembling an iPhone calculator is available using Tkinter.

⚠️ Python/Tkinter requirement

The GUI requires a Python build that includes the _tkinter module. On macOS, the system Python or some Homebrew installations (e.g. Python 3.13) may lack this support. Use Python 3.12 or another install with tcl-tk enabled. For example, you can install via Homebrew with:

brew install python@3.12 --with-tcl-tk

or download the macOS installer from https://python.org which bundles Tk.

After installing, make sure your python command points to the 3.12 interpreter.

python gui.py

Click buttons or use the onscreen keys to perform calculations. The GUI supports clear, sign toggle, percent, and basic arithmetic.