align image in center in html code example

Example 1: html center image

/* It's better practice to do this in CSS, not HTML. 
So here is the CSS code! */
img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

Example 2: How do i allign a pic centre in html

<img src="Sanjith.jpg" class="centre" height = "200" width = "100">