How to assign to a global variable in Sass?

Question

I run this Sass code:

$a: 1;
@if 2 + 2 == 4 {
    $a: 2;
}
@debug $a;

I expect to see 2. The output, however, is:

Line 5 D         


        

Answer 1

By trial-and-error, I found a solution: I have to add !global in the assignment.

$a: 1;
@if 2 + 2 == 4 {
    $a: 2 !global;
}
@debug $a;