how to use css to rotate 90 degrees code example

Example 1: css rotate 90 deg

transform: rotate(90deg);

Example 2: css rotate 180 degrees

.rotateimg180 {
  -webkit-transform:rotate(180deg);
  -moz-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
  -o-transform: rotate(180deg);
  transform: rotate(180deg);
}