JS1.html

<!DOCTYPE html>
<html>
<head>
    <title>Task 1 Javascript</title>
    <style>
        body {
            text-align: center;
            font-size: larger;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <h1>Task 1</h1>
    <br>
    <p>Enter a number and click the button to reverse it:</p>

    <!-- Input field for the user to enter a number -->
    <input type="number" id="userInput" placeholder="Enter a number">

    <!-- Button to trigger the reversal of the number -->
    <button onclick="reverseAndDisplay()">Reverse</button>

    <!-- Display the reversed number here -->
    <p id="result"></p>

    <script>
        function reverseNumber(x) {
            // Convert the number to a string
            let str = x.toString();

            // Reverse the string
            let reversedStr = str.split('').reverse().join('');

            // Convert the reversed string back to a number
            let reversedNumber = parseInt(reversedStr, 10);

            return reversedNumber;
        }

        function reverseAndDisplay() {
            // Get user input
            const userInput = document.getElementById("userInput").value;

            // Convert the user input to a number
            const num = parseFloat(userInput);

            if (!isNaN(num)) {
                const reversed = reverseNumber(num);
                document.getElementById("result").textContent = `Reversed number: ${reversed}`;
            } else {
                document.getElementById("result").textContent = "Invalid input. Please enter a valid number.";
            }
        }
    </script>
</body>
</html>