CALCULATOR/index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <script src="index.js" defer></script>
    <title>Calculator</title>
</head>
<body>
    <div class="App">
        <div class="display" id="display"></div>
  
          <div class="buttons">
            <button id="1" class="btn">1</button>
            <button id="2" class="btn">2</button>
            <button id="3" class="btn">3</button>
            <button id="/" class="btn highlight">/</button>
            <button id="4" class="btn">4</button>
            <button id="5" class="btn">5</button>
            <button id="6" class="btn">6</button>
            <button id="*" class="btn highlight">*</button>
            <button id="7" class="btn">7</button>
            <button id="8" class="btn">8</button>
            <button id="9" class="btn">9</button>
            <button id="+" class="btn highlight">+</button>
            <button id="0" class="btn">0</button>
            <button id="." class="btn">.</button>
            <button class="btn">=</button>
            <button id="-" class="btn highlight">-</button>
            <button class="btn highlight Clear">Clear</button>
            <button class="btn highlight Del">Del</button>
          </div>
      </div>
</body>
</html>