A loop that does your homework

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Times table</title>
  </head>
  <body>
    <main>
      <h1 id="heading">Times table</h1>
      <div id="rows"></div>
    </main>
  </body>
</html>