ef prints_chengfa(): """ 打印99乘法口诀 1*1=1 1*2=2 2*2=4 1*3=3 2*3=6 3*3=9 ... """ for i in range(1,10): for j in range(1,i + 1): print("{}X{}={} ".format(j,i,i * j),end="") print()