@while

@while

The @while directive takes a SassScript expression and repeatedly outputs the nested styles until the statement evaluates to false. This can be used to achieve more complex looping than the @for statement is capable of, although this is rarely necessary. For example:

$i: 6;
@while $i > 0 {
  .item-#{$i} { width: 2em * $i; }
  $i: $i - 2;
}

is compiled to:

.item-6 {
  width: 12em; }

.item-4 {
  width: 8em; }

.item-2 {
  width: 4em; }