Variables in html

<var>This text will be italicized</var>

How to use variables in HTML

<!DOCTYPE html>
<html>
   <head>
      <title>HTML var Tag</title>
   </head>
   <body>
      <p>The equations: <var>2x</var> - <var>4z</var> = <var>2y</var> + 3 and
         <var>x</var> + <var>5z</var> = <var>3y</var> + 6</p>
   </body>
</html>

Source: tutorialspoint.com

Html variables

<script>var screenWidth = screen.width;</script> 
...
<img src="images/title.png" onload="this.width=screenWidth;" style="margin-top: 3%">

Source: stackoverflow.com

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