The `<var>`

HTML element is used to represent a variable or a placeholder within inline text. It is typically used to denote a mathematical or programming variable, or any other type of variable or placeholder in a text context.

Here’s an example of how to use the `<var>`

element:

```
<p>
The formula to calculate the area of a circle is <var>A</var> =
<var>π</var> * <var>r</var><sup>2</sup>
</p>
```

In this example, the `<var>`

element is used to represent variables in a mathematical formula. The variables “A,” “π” (pi), and “r” are enclosed within `<var>`

tags to indicate that they are placeholders for values that will be substituted when using the formula.

The `<var>`

element does not have any special styling by default, but you can apply CSS styles to it if you want to distinguish variables from regular text. For example:

```
<style>
var {
font-style: italic;
}
</style>
```

In this case, the `<var>`

element is styled with italic font style to visually differentiate it from the surrounding text.

It’s important to note that the `<var>`

element should be used for variables or placeholders within inline text. If you need to represent variables in a more structured or programmatic way, you might consider using other elements such as `<code>`

or `<pre>`

for code snippets or mathematical markup languages like MathML.

In summary, the `<var>`

element is used to represent a variable or a placeholder within inline text. It is commonly used to denote mathematical or programming variables, or any other type of variable or placeholder in a text context. By using the `<var>`

element, you can provide visual emphasis and clarity to variables within your content.