Try it Editor

<!DOCTYPE html>
<html>
<body>
    <head>
        <style>
            table,
            th,
            td {
                border: 1px solid black;
            }
        </style>
    </head>
    <table style="width:100%">
        <tr>
            <th>Name</th>
            <th>Email</th>
            <th>Phone</th>
        </tr>
        <tr>
            <td>Divyasundar</td>
            <td>divya@gmail.com</td>
            <td>988812345</td>
        </tr>
    </table>
</body>
</html>