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python小程序练习：循环语句for，while实现99乘法表
打印99乘法表
for 循环语句实现：
for i in range(1,10):
for j in range(1,10):
print(j,"x",i,"=",i*j,"\t",end="") #因为print自动换行，end="" 为结尾不换行
if i==j:
print("") #此处是结尾换行
break
while循环语句实现：
i=0
j=0
while i <9:
i+=1
while j <9:
j += 1
print(j, "x", i, "=", i * j, "\t", end="")
if i==j:
print("")
j=0
break
输出结果：
1 x 1 = 1 1 x 2 = 2 2 x 2 = 4 1 x 3 = 3 2 x 3 = 6 3 x 3 = 9 1 x 4 = 4 2 x 4 = 8 3 x 4 = 12 4 x 4 = 16 1 x 5 = 5 2 x 5 = 10 3 x 5 = 15 4 x 5 = 20 5 x 5 = 25 1 x 6 = 6 2 x 6 = 12 3 x 6 = 18 4 x 6 = 24 5 x 6 = 30 6 x 6 = 36 1 x 7 = 7 2 x 7 = 14 3 x 7 = 21 4 x 7 = 28 5 x 7 = 35 6 x 7 = 42 7 x 7 = 49 1 x 8 = 8 2 x 8 = 16 3 x 8 = 24 4 x 8 = 32 5 x 8 = 40 6 x 8 = 48 7 x 8 = 56 8 x 8 = 64 1 x 9 = 9 2 x 9 = 18 3 x 9 = 27 4 x 9 = 36 5 x 9 = 45 6 x 9 = 54 7 x 9 = 63 8 x 9 = 72 9 x 9 = 81
python小程序练习：循环语句for，while实现99乘法表
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