A Lightweight Web-Based Calculator

Simple Calculator is a lightweight web-based calculator application that performs basic arithmetic operations with a clean, intuitive interface. Users can perform calculations directly in their browser without any installation requirements.

Key Features

• Basic arithmetic operations (addition, subtraction, multiplication, division)
• Decimal number support for precise calculations
• Clear (C) and All Clear (AC) functionality to reset calculations
• Percentage calculation feature for quick computations
• Memory functions (M+, M-, MR, MC) to store and recall values
• Keyboard support for inputting numbers and operators
• Real-time calculation display with immediate feedback
• Responsive design that works on desktop and mobile devices
• History tracking of previous calculations
• Error handling for invalid operations (division by zero, etc.)

How to Use

Simply click the buttons or use your keyboard to enter numbers and operators. The calculator supports:

• Numbers: 0-9 and decimal point (.)
• Operators: +, -, ×, ÷
• Special functions: % (percentage), C (clear), AC (all clear)
• Memory functions: MC (memory clear), MR (memory recall), M+ (memory add), M- (memory subtract)

Technical Information

This calculator is built with:

• Backend: PHP
• Frontend: HTML/CSS/JavaScript
• Database: MySQL
• Framework: Bootstrap 5