# Scientific Calculator

A desktop scientific calculator built with Python and Tkinter.

## Features

**Basic arithmetic**
- Addition, subtraction, multiplication, division
- Modulo (`%`), power (`xʸ`), parentheses
- Negate (`±`), decimal point

**Scientific functions**
- Trigonometry: `sin`, `cos`, `tan` (degrees)
- `√x` — square root
- `log` — base-10 logarithm
- `ln` — natural logarithm
- `x!` — factorial
- Constants: `π` and `e`

## Requirements

- Python 3.8+ (Tkinter is included in the standard library)

## Run

```bash
python calculator.py
```

## Keyboard shortcuts

| Key | Action |
|-----|--------|
| `0-9`, `.` | Digits |
| `+`, `-`, `*`, `/`, `%` | Operators |
| `(`, `)` | Parentheses |
| `Enter` | Evaluate |
| `Backspace` | Delete last character |
| `Esc` | Clear all |