css center image in box code example

Example 1: position images in center of container

.image-container {
    width: 500px;
    height: 500px;
    position: relative;
}

.image-container img {
    position: absolute;
    right: 0;
    left: 0;
    top: 0;
    bottom: 0;
    margin: auto auto;
}

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

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