🧮 Smart Calculator

A sleek and intelligent web-based calculator built using HTML, CSS, and JavaScript, hosted on GitHub Pages.
It’s designed to be fast, responsive, and smart — with proper handling for negative numbers, operator spam prevention, and instant error feedback.

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🌐 Live Demo

🔗 View it here → https://naman9104.github.io/Calculator/

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🚀 Features

• ✅ Perform basic arithmetic operations — +, -, *, /, %
• ✅ Smart operator handling (no ++, */, etc.)
• ✅ Supports negative numbers like -5 + 4
• ✅ “Error” clears with one Backspace or Delete click
• ✅ Works with keyboard inputs
• ✅ Fully responsive & minimal UI design

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🧠 How It Works

The calculator listens for both button clicks and keyboard input,
and uses safe JavaScript logic to evaluate expressions.

It also prevents:

• Consecutive operator inputs
• Invalid endings like 5+ or 9*/
• Starting with invalid symbols (except -)

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🧩 Tech Stack

Part	Technology
Structure	HTML5
Styling	CSS3
Logic	JavaScript (ES6)
Hosting	GitHub Pages

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⚙️ Setup Locally

You can run this calculator on your system easily:

# Clone this repository
git clone https://github.com/naman9104/Calculator.git

# Open the folder
cd Calculator

# Run the app
open index.html