Begin a repeated section

 Loop[ Until condition ]
  [ While condition ]
  [ For target = initial_expr to end_expr ]  [ by increment_expr]]
 The condition is tested at the top of the loop.
 For the LOOP FOR format, the increment expression (increment_expr) defaults to one and exits the loop when the target is greater than the end expression (end_expr). If the increment expression is negative, the loop exits if the target is less than the end expression.

 If %ACTION then Exit
 If %ITEM < "B" then Continue
 Gosub B
 Loop for row = 1 to n by 2
 Print to FORM Pos(row,2); "ITEM";row