how to center img in a body css code example

Example 1: How do i allign a pic centre in html

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

Example 2: how to make text center above image html

#container {
  text-align: center;
}

.text {
  display: inline-block;
  margin: 0 20px 0 20px;
}

.img {
  margin: 0 20px 0 20px;
  width: 50px;
  height: 50px;
}