Find the factorial of a number n in Internet Technologies B.Sc 5th sem

<!DOCTYPE html>

<html>

<head>

<title>Factorial Calculator</title>

</head>

<body>

<h1>Factorial Calculator</h1>

<p>Enter a number: <input type="number" id="numberInput"></p>

<button onclick="calculateFactorial()">Calculate Factorial</button>

function calculateFactorial() {

var n = parseInt(document.getElementById("numberInput").value);

if (isNaN(n)) {

document.getElementById("result").innerText = "Please enter a valid number.";

return;

}

if (n < 0) {

document.getElementById("result").innerText = "Factorial is not defined for negative numbers.";

return;

}

var factorial = 1;

for (var i = 1; i <= n; i++) {

factorial *= i;

}

document.getElementById("result").innerText = "Factorial of " + n + " is: " + factorial;

}

</script>

</body>

</html>

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