Code and Output for sub:

Code:

    <!DOCTYPE html>
    <html>
    <head>
      <title>HTML Example</title>
    </head>
    <body>
      <h1>The sub element</h1>
     <p>This text contains <sub>subscript</sub> text. </p>
    </body>
    </html>
  

Output:

The sub element

This text contains _subscript text.