variable referencing in MolPro

[Seth Olsen]

I'm doing a potential energy scan along a coordinate, and would like to create molden files and ASCII orbital files at each point.  To this end, I would like to know what syntax to use to create filenames that include the variable indexing the appropriate DO loop, for example (though I know this doesn't work- I tried).
do i=1,5
put,molden,example$i.molden
enddo

This command appears to create a file called example$i.molden, and not example1.molden etc.  Is there a way to do what I want?