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优化乘法口诀表的代码 #1089

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优化乘法口诀表的代码 #1089

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18 changes: 9 additions & 9 deletions Day01-20/06.循环结构.md
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Original file line number Diff line number Diff line change
Expand Up @@ -213,22 +213,22 @@ Author: 骆昊
"""
for i in range(1, 10):
for j in range(1, i + 1):
print(f'{i}×{j}={i * j}', end='\t')
print(f'{j}×{i}={j * i}', end='\t')
print()
```

上面的代码中，`for-in`循环的循环体中又用到了`for-in`循环，外面的循环用来控制产生`i`行的输出，而里面的循环则用来控制在一行中输出`j`列。显然，里面的`for-in`循环的输出就是乘法口诀表中的一整行。所以在里面的循环完成时，我们用了一个`print()`来实现换行的效果，让下面的输出重新另起一行，最后的输出如下所示。

```
1×1=1
2×1=2 2×2=4
3×1=3 3×2=6 3×3=9
4×1=4 4×2=8 4×3=12 4×4=16
5×1=5 5×2=10 5×3=15 5×4=20 5×5=25
6×1=6 6×2=12 6×3=18 6×4=24 6×5=30 6×6=36
7×1=7 7×2=14 7×3=21 7×4=28 7×5=35 7×6=42 7×7=49
8×1=8 8×2=16 8×3=24 8×4=32 8×5=40 8×6=48 8×7=56 8×8=64
9×1=9 9×2=18 9×3=27 9×4=36 9×5=45 9×6=54 9×7=63 9×8=72 9×9=81
1×2=2 2×2=4
1×3=3 2×3=6 3×3=9
1×4=4 2×4=8 3×4=12 4×4=16
1×5=5 2×5=10 3×5=15 4×5=20 5×5=25
1×6=6 2×6=12 3×6=18 4×6=24 5×6=30 6×6=36
1×7=7 2×7=14 3×7=21 4×7=28 5×7=35 6×7=42 7×7=49
1×8=8 2×8=16 3×8=24 4×8=32 5×8=40 6×8=48 7×8=56 8×8=64
1×9=9 2×9=18 3×9=27 4×9=36 5×9=45 6×9=54 7×9=63 8×9=72 9×9=81
```

### 循环结构的应用
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