How to make a variable with a parameter in less?

Question

Sass

help with less
in sass to create a variable or mixin, don't know exactly what it's called I'm using

=mt($time)
  transition: all $time ease

How to do the same in less

Answer 1

This is a mixin:

.mt(@time) {
  transition: all @time ease;
}

.header {
  .mt;
}

Of course, the SASS code is much more logical.