freeCodeCamp/guide/english/certifications/front-end-libraries/sass/use-if-and-else-to-add-logic-to-your-styles/index.md

---
title: Use @if and @else to Add Logic To Your Styles
---
## Use @if and @else to Add Logic To Your Styles

## Solution
```sass
<style type='text/sass'>
  @mixin border-stroke($val) {
    @if $val == light {
      border: 1px solid black;
    }
    @else if $val == medium {
      border: 3px solid black;
    }
    @else if $val == heavy {
      border: 6px solid black;
    }
    @else {
      border: none;
    }
  }
  
  #box {
    width: 150px;
    height: 150px;
    background-color: red;
    @include border-stroke(medium);
  }  
</style>

<div id="box"></div>

```