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calcultor.html
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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>
/* CSS will go here */
</style>
</head>
<body>
<div class="calculator">
<div class="display" id="display">0</div>
<div class="buttons">
<button onclick="clearDisplay()">C</button>
<button onclick="appendToDisplay('7')">7</button>
<button onclick="appendToDisplay('8')">8</button>
<button onclick="appendToDisplay('9')">9</button>
<button class="operator" onclick="appendToDisplay('+')">+</button>
<button onclick="appendToDisplay('4')">4</button>
<button onclick="appendToDisplay('5')">5</button>
<button onclick="appendToDisplay('6')">6</button>
<button class="operator" onclick="appendToDisplay('-')">-</button>
<button onclick="appendToDisplay('1')">1</button>
<button onclick="appendToDisplay('2')">2</button>
<button onclick="appendToDisplay('3')">3</button>
<button class="operator" onclick="appendToDisplay('*')">*</button>
<button onclick="appendToDisplay('0')">0</button>
<button onclick="appendToDisplay('.')">.</button>
<button class="equals" onclick="calculate()">=</button>
<button class="operator" onclick="appendToDisplay('/')">/</button>
</div>
</div>
<script>
// JavaScript will go here
</script>
</body>
</html>
<!-- CSS -->
<style>
body {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
font-family: Arial, sans-serif;
background-color: #f0f0f0;
}
.calculator {
background-color: #333;
border-radius: 10px;
padding: 20px;
box-shadow: 0 0 10px rgba(0,0,0,0.2);
}
.display {
background-color: #fff;
color: #333;
font-size: 24px;
padding: 10px;
text-align: right;
margin-bottom: 10px;
border-radius: 5px;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 10px;
}
button {
background-color: #4CAF50;
border: none;
color: white;
padding: 15px;
text-align: center;
text-decoration: none;
font-size: 18px;
cursor: pointer;
border-radius: 5px;
transition: background-color 0.3s;
}
button:hover {
background-color: #45a049;
}
.operator {
background-color: #f44336;
}
.operator:hover {
background-color: #da190b;
}
.equals {
background-color: #008CBA;
}
.equals:hover {
background-color: #007a9e;
}
</style>
<!-- JavaScript -->
<script>
let displayValue = '0';
function updateDisplay() {
document.getElementById('display').innerText = displayValue;
}
function appendToDisplay(value) {
if (displayValue === '0' && value !== '.') {
displayValue = value;
} else {
displayValue += value;
}
updateDisplay();
}
function clearDisplay() {
displayValue = '0';
updateDisplay();
}
function calculate() {
try {
displayValue = eval(displayValue).toString();
updateDisplay();
} catch (error) {
displayValue = 'Error';
updateDisplay();
}
}
</script>