Super Calculator 🧮

A Casio fx-991EX style scientific calculator — available as both a browser app (HTML/CSS/JS) and a native desktop app (Python/tkinter).

Dark navy body, mint LCD display, colour-coded keys (green SHIFT, purple ALPHA, orange AC/⌫) with gold secondary labels — just like the real thing.

✨ Features

• Basic arithmetic — + − × ÷ %, parentheses
• Scientific functions — sin cos tan, log ln, √, x², xʸ, x⁻¹, factorial, Exp (×10ⁿ)
• DEG / RAD mode toggle (MODE key)
• Memory — M+, RCL (recall)
• Ans — reuse the last result
• History — scroll past calculations with ▲ ▼, saved between sessions
• Full keyboard support — Enter = equals, Esc clears, Backspace, ↑ ↓ for history
• Safe expression evaluator (sandboxed — no eval injection)

🚀 Usage

Web version (no install)

Just open super-calculator.html in any browser. History is saved in localStorage.

Desktop version (Python)

Requires Python 3 (standard library only — no pip installs needed):

python super_calculator.py

Windows executable

A standalone SuperCalculator.exe can be built with PyInstaller:

pip install pyinstaller
pyinstaller --onefile --windowed --name SuperCalculator super_calculator.py

The executable appears in the dist/ folder — double-click to run, no Python required.

🎨 Layout

A 6-column scientific function area on top of a 5-column number pad, matching the Casio fx-991EX. Decorative keys (CALC, ∫dx, hyp, S⇔D…) are present for the authentic look; the fully functional keys cover everyday and scientific maths.

📄 License

MIT — see LICENSE.