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Building a calculator in HTML involves combining HTML for structure, CSS for styling, and JavaScript for functionality. This allows you to perform basic operations like addition, subtraction, multiplication, and division interactively.
Step 1: Create the HTML Structure
Use HTML to define the calculator layout with a display area and buttons.
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>HTML Calculator</title><link rel="stylesheet" href="style.css"></head><body><div class="calculator"><input type="text" id="result" disabled><div class="buttons"><button onclick="clearDisplay()">C</button><button onclick="appendValue('/')">/</button><button onclick="appendValue('*')">*</button><button onclick="appendValue('-')">-</button><button onclick="appendValue('7')">7</button><button onclick="appendValue('8')">8</button><button onclick="appendValue('9')">9</button><button onclick="appendValue('+')">+</button><button onclick="appendValue('4')">4</button><button onclick="appendValue('5')">5</button><button onclick="appendValue('6')">6</button><button onclick="calculateResult()">=</button><button onclick="appendValue('1')">1</button><button onclick="appendValue('2')">2</button><button onclick="appendValue('3')">3</button><button onclick="appendValue('0')">0</button><button onclick="appendValue('.')">.</button></div></div><script src="script.js"></script></body></html>Copied!âś•Copy HTML Calculator - GeeksforGeeks
Aug 5, 2025 · HTML calculator is used for performing basic mathematical operations like Addition, subtraction, multiplication, and division. You can find the live preview below, try it:
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