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| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Calculator</title> | |
| <style> | |
| body { | |
| font-family: Arial, sans-serif; | |
| display: flex; | |
| justify-content: center; | |
| align-items: center; | |
| height: 100vh; | |
| margin: 0; | |
| background-color: #f4f4f9; | |
| } | |
| .calculator { | |
| background-color: #fff; | |
| padding: 20px; | |
| border-radius: 10px; | |
| box-shadow: 0 0 10px rgba(0, 0, 0, 0.1); | |
| } | |
| .display { | |
| width: 100%; | |
| height: 50px; | |
| margin-bottom: 20px; | |
| background-color: #222; | |
| color: white; | |
| font-size: 2rem; | |
| text-align: right; | |
| padding: 10px; | |
| border-radius: 5px; | |
| border: none; | |
| } | |
| .buttons { | |
| display: grid; | |
| grid-template-columns: repeat(4, 1fr); | |
| gap: 10px; | |
| } | |
| .buttons button { | |
| padding: 20px; | |
| font-size: 1.5rem; | |
| border-radius: 5px; | |
| background-color: #f0f0f0; | |
| border: 1px solid #ddd; | |
| cursor: pointer; | |
| } | |
| .buttons button:hover { | |
| background-color: #d0d0d0; | |
| } | |
| .buttons button:active { | |
| background-color: #b0b0b0; | |
| } | |
| .equal { | |
| background-color: #4CAF50; | |
| color: white; | |
| } | |
| .clear { | |
| background-color: #f44336; | |
| color: white; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="calculator"> | |
| <input type="text" class="display" id="display" disabled> | |
| <div class="buttons"> | |
| <button onclick="appendToDisplay('7')">7</button> | |
| <button onclick="appendToDisplay('8')">8</button> | |
| <button onclick="appendToDisplay('9')">9</button> | |
| <button onclick="appendToDisplay('+')">+</button> | |
| <button onclick="appendToDisplay('4')">4</button> | |
| <button onclick="appendToDisplay('5')">5</button> | |
| <button onclick="appendToDisplay('6')">6</button> | |
| <button onclick="appendToDisplay('-')">-</button> | |
| <button onclick="appendToDisplay('1')">1</button> | |
| <button onclick="appendToDisplay('2')">2</button> | |
| <button onclick="appendToDisplay('3')">3</button> | |
| <button onclick="appendToDisplay('*')">*</button> | |
| <button onclick="appendToDisplay('0')">0</button> | |
| <button onclick="appendToDisplay('.')">.</button> | |
| <button onclick="clearDisplay()" class="clear">C</button> | |
| <button onclick="appendToDisplay('/')">/</button> | |
| </div> | |
| <button onclick="calculateResult()" class="equal">=</button> | |
| </div> | |
| <script> | |
| // Function to append the clicked button value to the display | |
| function appendToDisplay(value) { | |
| document.getElementById('display').value += value; | |
| } | |
| // Function to clear the display | |
| function clearDisplay() { | |
| document.getElementById('display').value = ''; | |
| } | |
| // Function to calculate the result of the expression in the display | |
| function calculateResult() { | |
| try { | |
| let result = eval(document.getElementById('display').value); | |
| document.getElementById('display').value = result; | |
| } catch (error) { | |
| document.getElementById('display').value = 'Error'; | |
| } | |
| } | |
| </script> | |
| </body> | |
| </html> | |