It would be pretty much useful to have the ability to specify data type in the data variables as indicated in the image attached. This is for the case of report builder with no data source.
The way the plugin works as of the most recent version:
If you create a report using the teport builder and you don’t want to use any datatable and you want users to input the fields in the front ent then even where the user is supposed to input a number, the forms will accept text.
So the only workaround available now is using a data source.