index.html

<!DOCTYPE html>
<html>
<head>
    <title>Name & Age Validator</title>
    <link rel="stylesheet" type="text/css" href="main.css">
</head>

<body>
    <main>
        <h1>Name & Age Validator</h1>
        <form action="display_Name_Age.php" method="post">

            <div id="data">
                <label>First Name:</label>
                <input type="text" name="First_Name"><br>

                <label>Last Name:</label>
                <input type="text" name="Last_Name"><br>

                <label>How many years old are you?</label>
                <input type="text" name="Age"><span>Years</span><br>
            </div>

            <div id="buttons">
                <label>&nbsp;</label>
                <input type="submit" value="Validate Age"><br>
            </div>

        </form>
    </main>
</body>
</html>