[classad-users] string concatenation

[Maraska <alessandro.maraschini@xxxxxxxxxx>]

Hi all,
is there any method that, given a couple of strings, concatenates them
and returns the resulting string?
I've tried withe the "+" operator but it didn't work.
The reason is that we're trying to provide to the user the possibility
to parametrise its jobs. In other words we would like to manage a classad
like:
values={ "1" , "2" , "2bis" ........   , "last" } ;
input ="input" + values[ i ]  ;
output = "output" + values[ i ] ;
and then generate n classad iterating over the values.
thank you,
Alessandro