Problem Statement

Quite often one needs loops which, in the last iteration, execute only part of the loop body. Demonstrate the best way to do this. Write a loop which writes the comma-separated list using separate output statements for the number and the comma from within the body of the loop.

Let's start with the solution:

repeat with n = 1 to 10
    put n after loopn
    if n is not 10 then put comma after loopn
end repeat
put loopn