With that particular expression? A boolean result of true, and that any user will match the rule. This is just an experiment. But if this simple expression doesn't work, more complex (and useful) ones surely won't either. And I read the docs.
This is a perfect question you have asked. Here is the solution for your query 'Convert.toInt('1')' > 0 or 'Convert.toInt('1')' > '0' Because return type of Convert is Integer and that comparision not gonna work her. So convert that way. Hope this satisfied your query.