    5 input "n" , n
   10 for i = 1 to n
   20 a$ = "testing....." 
   25 b$ = a$ + " again" 
   30 next i
   40 end 
  100 a$ = a$ + "a" 
  110 print len( a$ ) , 
  120 goto 100
  200 dim a$ ( 1000 ) 
  205 for i = 1 to 1000
  210 a$ ( i ) = "hi" 
  220 next i
