Calculator coding
<!DOCTYPE html>
<html>
<head>
<title>Calculator</title>
<script>
function calculate() {
var num1 = document.getElementById("num1").value;
var num2 = document.getElementById("num2").value;
var operator = document.getElementById("operator").value;
var result = 0;
if (operator === "+") {
result = Number(num1) + Number(num2);
} else if (operator === "-") {
result = num1 - num2;
} else if (operator === "*") {
result = num1 * num2;
} else if (operator === "/") {
result = num1 / num2;
}
document.getElementById("result").value = result;
}
</script>
</head>
<body>
<h1>Calculator</h1>
<label for="num1">Number 1:</label>
<input type="number" id="num1">
<br><br>
<label for="operator">Operator:</label>
<select id="operator">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<br><br>
<label for="num2">Number 2:</label>
<input type="number" id="num2">
<br><br>
<button onclick="calculate()">Calculate</button>
<br><br>
<label for="result">Result:</label>
<input type="number" id="result" readonly>
</body>
</html>
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