In HTML, the <code>&lt;u&gt;</code> tag is used to represent text that should be displayed with an underline. The <code>&lt;u&gt;</code> tag is an inline element, which means that it can be used within a line of text and does not create a new line.
Here is an example of how to use the underline tag in an html document
<pre><code class="lang-plaintext">&lt;p&gt;This is a paragraph with &lt;u&gt;underlined&lt;/u&gt; text.&lt;/p&gt;
</code></pre>

In HTML, the `` tag is used to represent text that should be displayed with an underline. The `` tag is an inline element, which means that it can be used within a line of text and does not create a new line.

Here is an example of how to use the underline tag in an html document

```plaintext
This is a paragraph with underlined text.
```

Underline tag