How to generate CSS with loop in less

Question

I am not familiar with Less. In my understanding, I think Less can transform the less format file to standard css file(if

Answer 1

It is impossible to do within given methods.

But possible like this:

.loopingClass (@index) when (@index > 0){
  .span_@{index}{
    width: @index px;
  }
  .loopingClass(@index - 1);
}
.loopingClass(5);

Resilt will be like this:

.span_100 {
  width: 100 px;
}
.span_99 {
  width: 99 px;
}
.span_98 {
  width: 98 px;
}
.span_97 {
  width: 97 px;
}
.span_96 {
  width: 96 px;
}
.span_95 {
  width: 95 px;
}

and e.t.c.