Calculator App

A clean, responsive calculator built with HTML, CSS, and vanilla JavaScript.

Live Demo

View Live

Features

• Basic operations — addition, subtraction, multiplication, division, modulus
• Decimal support
• Chained calculations (e.g. 5 + 3 × 2)
• Keyboard support (type numbers and operators directly)
• Backspace key to delete last digit
• Error handling for division by zero
• Responsive design

Keyboard Shortcuts

Key	Action
0–9	Number input
+ - * /	Operators
Enter or =	Calculate
Backspace	Delete last digit
Escape	Clear all

Tech Stack

• HTML5
• CSS3 (Grid layout, CSS transitions)
• Vanilla JavaScript (DOM manipulation, event listeners)

What I Learned

• DOM manipulation with querySelector and querySelectorAll
• Handling user events with addEventListener
• Managing application state with variables
• Keyboard event handling with keydown
• Floating point precision with toFixed()

How to Run Locally

1. Clone the repo
   git clone https://github.com/sumiran3031/calculator.git
2. Open index.html in your browser — no setup needed!

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Made by Sumiran Paparkar