how to center things in html pafe code example

Example 1: center with css

.parent {
  position: relative;
}
.child {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

Example 2: center p html

<p style="text-align: center">this is centered</p>

Example 3: centering in html

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