How to align form in center in HTML5 code example

Example 1: html align form center

form {
  text-align: center;
}

Example 2: align form to center of page

form {
	text-align: center;
}

Example 3: centering in html

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