how to align an image in the center code example

Example 1: css center image

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

Example 2: image align center

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}

Example 3: center an image

.someclass {
  display: block;
  margin-left: auto;
  margin-right: auto;
}