How to pass parameters to css classes

Question

I want to know is it possible to add some flexibility to css via this:

where .round i

Answer 1

Maybe what you want is like this

CSS

.round {
  border-radius: 4px; /*it's default when you juse using .round*/
}
.round.five {
  border-radius: 5px;
}
.round.ten {
  border-radius: 10px;
}

HTML

something