The advantages of using CSS preprocessors

The embodiment of a design layout without using HTML and CSS.

If the markup language allows us to sketch out a template of the required elements, the CSS converts this template to a necessary mind as the source.

I should add that there are plenty to choose from, because there are many CSS preprocessors, but it should highlight the most popular:

All of these preprocessors have almost identical functionality, there are only small differences in the syntax.

Look at this fragment of code written in Sass.

All of this translated to the following CSS: