function performCalculation() {
var value1 = parseFloat(document.getElementById(“value1”).value);
var value2 = parseFloat(document.getElementById(“value2”).value);
var operation = document.getElementById(“operation”).value;
var result;
if (isNaN(value1) || isNaN(value2)) {
alert(“Please enter valid numbers.”);
return;
}
switch (operation) {
case “add”:
result = value1 + value2;
break;
case “subtract”:
result = value1 – value2;
break;
case “multiply”:
result = value1 * value2;
break;
case “divide”:
if (value2 === 0) {
alert(“Cannot divide by zero.”);
return;
}
result = value1 / value2;
break;
default:
result = 0;
}
document.getElementById(“calculated-result”).innerText = result.toFixed(2);
}
