---
title: "@for"
---

The `@for` rule, written
`@for <variable> from <expression> to <expression> { ... }` or
`@for <variable> from <expression> through <expression> { ... }`, counts up or
down from one number (the result of the first [expression][]) to another (the
result of the second) and evaluates a block for each number in between. Each
number along the way is assigned to the given variable name. If `to` is used,
the final number is excluded; if `through` is used, it's included.

[expression]: ../syntax/structure#expressions

<% example do %>
$base-color: #036;

@for $i from 1 through 3 {
  ul:nth-child(3n + #{$i}) {
    background-color: lighten($base-color, $i * 5%);
  }
}
===
$base-color: #036

@for $i from 1 through 3
  ul:nth-child(3n + #{$i})
    background-color: lighten($base-color, $i * 5%)
<% end %>