Simple Web Calculator

A clean, modern, and responsive web-based calculator for basic arithmetic operations, built with HTML, CSS, and JavaScript. Designed with an intuitive dark theme interface and mobile-friendly layout, this calculator provides seamless usability, elegant error handling, and robust performance for everyday calculation needs.

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✨ Features

• Basic Arithmetic: Supports addition, subtraction, multiplication, and division.
• Clear, Modern UI: Responsive dark-themed interface inspired by professional calculators.
• Live Input & Results: Real-time input display with result rendering.
• Decimal & Large Number Support: Input decimals and handle large values gracefully.
• Error Handling: Alerts for invalid input and calculation errors.
• Fast Keyboard-Free Operation: Click-to-enter numbers and operators; 'AC' (All Clear) and 'DEL' (Delete last character) functions.
• Special Button Styling: '0' button spans two columns, '=' (Equal) button spans two rows for easier usability.
• Google Fonts: Uses 'Roboto Mono' for distinctive, readable display.
• Fully Responsive Design: Looks and works great on both desktop and mobile browsers.

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🗂️ Project Structure

├── 1.html         # Main HTML file (UI and structure)
├── 1style.css     # Styling (responsive dark theme, layout)
├── script.js      # Dynamic calculator logic (all interactions)
├── LICENSE        # MIT License
└── README.md      # Documentation

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🚀 Getting Started

Requirements

• Any modern web browser (Chrome, Firefox, Safari, Edge)
• Internet connection (only needed to fetch the Roboto Mono font on first load)
• JavaScript enabled

Installation

1. Clone or Download:
   Download this repository as a zip, or clone it with:

   git clone https://github.com/TacticalReader/Simple-Web-Calculator.git
   

2. Open Calculator:
   Double-click 1.html (or right-click → Open with... → browser of your choice).

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🕹️ Usage

• Entering Numbers: Click digit buttons (0–9) to input numbers.
• Operations: Click '+', '-', '×', or '÷' for arithmetic.
• Decimal Point: '.' is available for decimal calculations.
• Result: Click '=' to instantly compute.
• Clear: Click 'AC' to reset everything.
• Delete: Click 'DEL' to erase the last digit/character.
• Error Handling: Invalid expressions will trigger a browser alert.

Examples:

• Input: 5 + 3, then = → Output: 8
• Input: 12 / 4, then = → Output: 3

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🔧 Customization

• Styling: The CSS (1style.css) uses CSS3 Grid for layout and a vibrant dark gradient background.
• Fonts: Google Fonts' 'Roboto Mono' is imported for a coding-inspired look.
• Responsive: Designed with mobile and desktop breakpoints—no code changes needed.

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🛠️ Technology Stack

• HTML5 – for UI structure
• CSS3/Grid – for design and responsiveness
• JavaScript (Vanilla ES6+) – for logic and interactivity
• Google Fonts – for typography

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🤝 Contributing

Contributions are encouraged!

• Fork the repo, create a new branch, make your changes, and submit a pull request.
• See issues for things to improve or bugs to fix.
• Suggest enhancements—UI, accessibility, or advanced functions like scientific calculations.

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📄 License

This project is licensed under the MIT License — see the LICENSE file for details.

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📝 Acknowledgments

• Roboto Mono (Google Fonts): for modern, readable display
• UI design inspired by modern, minimal calculator apps

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Enjoy fast, minimal, and reliable web calculations — open source and always improving!

1 https://codecanyon.net/category/javascript?sort=price-asc&term=countdown#content 2