一般列印 print('KJ') print('KJ') print('KJ') # KJ # KJ # KJ 列印不换行 print('KJ', end='') print('KJ', end='') print('KJ', end='') # KJKJKJ 列印字尾加入符号 print('KJ', end=', ') print('KJ', end=', ') print('KJ', end=', ') # KJ, KJ, KJ,