def processCharacter(character,quantity, currentstring):
  currentstring = currentstring + quantity * character
  return currentstring

thisstring = ""
stop = "NO"
while stop == "NO":
  character = input("enter a character")
  qty = int(input("enter quantity of characters"))
  thisstring = processCharacter(character,qty,thisstring)
  print(thisstring)
  stop = input("Stop ? yes or NO")