CALCULATOR/CALCULATOR.html at main · Ronit049/CALCULATOR · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>Basic Calculator</title>
  <style>
    body {
      font-family: 'Segoe UI', sans-serif;
      background-color: #f2f2f2;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
    }

    .calculator {
      background: #fff;
      padding: 20px;
      border-radius: 12px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.1);
      width: 300px;
    }

    .display {
      width: 100%;
      height: 60px;
      font-size: 24px;
      text-align: right;
      padding: 10px;
      border: none;
      margin-bottom: 15px;
      border-radius: 8px;
      background-color: #f9f9f9;
    }

    .buttons {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
    }

    .buttons button {
      padding: 20px;
      font-size: 18px;
      border: none;
      border-radius: 8px;
      background-color: #007bff;
      color: white;
      cursor: pointer;
      transition: 0.3s;
    }

    .buttons button:hover {
      background-color: #0056b3;
    }

    .buttons .clear {
      background-color: #dc3545;
    }

    .buttons .clear:hover {
      background-color: #b52b3b;
    }

    .buttons .equal {
      background-color: #28a745;
      grid-column: span 2;
    }

    .buttons .equal:hover {
      background-color: #218838;
    }
  </style>
</head>
<body>

  <div class="calculator">
    <input type="text" id="display" class="display" disabled />
    <div class="buttons">
      <button onclick="append('7')">7</button>
      <button onclick="append('8')">8</button>
      <button onclick="append('9')">9</button>
      <button onclick="append('/')">/</button>

      <button onclick="append('4')">4</button>
      <button onclick="append('5')">5</button>
      <button onclick="append('6')">6</button>
      <button onclick="append('*')">*</button>

      <button onclick="append('1')">1</button>
      <button onclick="append('2')">2</button>
      <button onclick="append('3')">3</button>
      <button onclick="append('-')">-</button>

      <button onclick="append('0')">0</button>
      <button onclick="append('.')">.</button>
      <button onclick="append('+')">+</button>
      <button onclick="clearDisplay()" class="clear">C</button>

      <button onclick="calculate()" class="equal">=</button>
    </div>
  </div>

  <script>
    const display = document.getElementById('display');

    function append(value) {
      display.value += value;
    }

    function clearDisplay() {
      display.value = '';
    }

    function calculate() {
      try {
        display.value = eval(display.value);
      } catch (error) {
        display.value = 'Error';
      }
    }
  </script>
</body>
</html>