🧮 PyQt Calculator

A desktop calculator application built with Python and PyQt5.
Supports mouse and keyboard input, basic arithmetic operations, and several advanced mathematical functions.

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📸 Screenshot

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✨ Features

• Mouse and keyboard input (always enabled)
• Clean and intuitive calculator layout
• Supports large numbers with horizontal scrolling
• Input validation (no letters or invalid symbols)

🧠 Mathematical operations

• Addition +
• Subtraction -
• Multiplication *
• Division /
• Power x^y
• Square x²
• Square root √x
• Factorial !
  • Supports values like 3 and 3.0
  • Rejects negative and non-integer values

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⌨️ Keyboard Support

The calculator fully supports keyboard input:

• 0–9 — digits
• + - * / . ^ — operators
• Enter — calculate result
• Backspace — delete last character
• Esc — clear input

Invalid characters (letters, unsupported symbols) are automatically blocked.

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🛠 Technologies Used

• Python 3
• PyQt5
• Standard Python libraries (math)

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🚀 How to Run

1. Install dependencies:

   pip install pyqt5