how to align content in center code example

Example 1: css align center

//HTML
<div class="parent">
	<span>Hello World</span>
</div>

//CSS
.parent {
  display: flex;
  justify-content: center;
  align-items: center;
}

Example 2: how to center an image element inside a block in css

img { display:block;
      margin-left: auto;
      margin-right:auto;
      }

Example 3: how to make a division center css

position:absolute;
top:50%;
left:50%;
transform:translate(-50%,-50%);

Example 4: center text css

p {
  text-align: center;
}