main(params):+
  stack =: new row                \ a row is a nice stack
  ?# v =: tuple 1,3,5,7,11,13 give values
    row stack push v              \ push some primes
  print '*' _ stack[stack.Count]  \ get top
  ?# i =: from 1 upto 7
    ? i %% 3 = 0
      print '*' _ stack[stack.Count]
    print stack::pop              \ class function syntax used