python實現九九乘法表正三角和倒三角

# ##1、正三角

for y in range(1,10): ##從1到9共迴圈9次，1次就控制1行
for x in range(1,y+1): ###控制當前公式的計算和列印次數
print("%d x %d = %d"%(x,y,x*y),end="\t") ##公式和公式之間 空格，\t的作用是保持上下對齊但是不換行
print() ##一行結束，預設print()換行
##2、倒三角
for y in range(-9,0): ##從-9到-1共迴圈9次，1次控制1行
for x in range(1,-y+1): ###控制當前公式的計算和列印次數
print("%d x %d = %d"%(x,-y,x*(-y)),end="\t") ##公式和公式之間 空格，但是不換行
print() ##一行結束，預設print()換行
執行結果：
1、正三角

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

2、倒三角

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

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 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 6 = 6 2 x 6 = 12 3 x 6 = 18 4 x 6 = 24 5 x 6 = 30 6 x 6 = 36

1 x 5 = 5 2 x 5 = 10 3 x 5 = 15 4 x 5 = 20 5 x 5 = 25

1 x 4 = 4 2 x 4 = 8 3 x 4 = 12 4 x 4 = 16

1 x 3 = 3 2 x 3 = 6 3 x 3 = 9

1 x 2 = 2 2 x 2 = 4

1 x 1 = 1

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