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index.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>Simple Calculator</title>
<style>
input[type="text"] {
width: 100px;
margin: 5px;
}
</style>
</head>
<body>
<h1>Simple Calculator</h1>
<input type="text" id="num1" placeholder="Number 1">
<input type="text" id="num2" placeholder="Number 2">
<br>
<button onclick="calculate('+')">+</button>
<button onclick="calculate('-')">-</button>
<button onclick="calculate('*')">*</button>
<button onclick="calculate('/')">/</button>
<br>
<h2 id="result">Result: </h2>
<script>
function calculate(operator) {
const num1 = parseFloat(document.getElementById('num1').value);
const num2 = parseFloat(document.getElementById('num2').value);
let result;
switch (operator) {
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case '*':
result = num1 * num2;
break;
case '/':
if (num2 !== 0) {
result = num1 / num2;
} else {
result = 'Error: Division by zero';
}
break;
default:
result = 'Invalid operation';
}
document.getElementById('result').innerText = 'Result: ' + result;
}
</script>
</body>
</html>