how to use center tag in html code example

Example 1: html center tag

<center>
	<p>This is centered</p>
</center>

Example 2: centering in html

<style>
  element
  {
    text-align: center;
  }
</style>
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style.css
element
{
	text-align: center;
}

Example 3: how to center a html header

h1{text-align: center;}