Code and Output for dfn:

Code:

    <!DOCTYPE html>
    <html>
    <head>
      <title>HTML Example</title>
    </head>
    <body>
      <h1>The dfn element</h1>
      <p><dfn>HTML</dfn>is the standard markup language for creating webpages.</p>
    </body>
    </html>
  

Output:

The dfn element

HTML is the standard markup language for creating webpages.