Workflow Editor 4.1.1 Floating Point Math

I noticed that the float field type was added in YouTrack 4.1.1.  I am trying to create a workflow rule that needs to create float variables and perform floating point math.  However, when I try to make a variable such as:

var priority = 2.3;

I get a red underline squiggle under the ".3" part of the assignment.  Is there a way to create or use floats in the workflow editor?