题目：输出9*9乘法口诀表。

程序分析：分行与列考虑，共9行9列，i控制行，j控制列。

程序源代码：

#!/usr/bin/python
# -*- coding: UTF-8 -*-

for i in range(1,10):
    for j in range(1,10):
        result = i * j
        print '%d * %d = % -3d' % (i,j,result)
    print ''

以上实例输出结果为：

1 * 1 =  1 
1 * 2 =  2 
1 * 3 =  3 
1 * 4 =  4 
1 * 5 =  5 
1 * 6 =  6 
1 * 7 =  7 
1 * 8 =  8 
1 * 9 =  9 

2 * 1 =  2 
2 * 2 =  4 
2 * 3 =  6 
2 * 4 =  8 
2 * 5 =  10
2 * 6 =  12
2 * 7 =  14
2 * 8 =  16
2 * 9 =  18

3 * 1 =  3 
3 * 2 =  6 
3 * 3 =  9 
3 * 4 =  12
3 * 5 =  15
3 * 6 =  18
3 * 7 =  21
3 * 8 =  24
3 * 9 =  27

4 * 1 =  4 
4 * 2 =  8 
4 * 3 =  12
4 * 4 =  16
4 * 5 =  20
4 * 6 =  24
4 * 7 =  28
4 * 8 =  32
4 * 9 =  36

5 * 1 =  5 
5 * 2 =  10
5 * 3 =  15
5 * 4 =  20
5 * 5 =  25
5 * 6 =  30
5 * 7 =  35
5 * 8 =  40
5 * 9 =  45

6 * 1 =  6 
6 * 2 =  12
6 * 3 =  18
6 * 4 =  24
6 * 5 =  30
6 * 6 =  36
6 * 7 =  42
6 * 8 =  48
6 * 9 =  54

7 * 1 =  7 
7 * 2 =  14
7 * 3 =  21
7 * 4 =  28
7 * 5 =  35
7 * 6 =  42
7 * 7 =  49
7 * 8 =  56
7 * 9 =  63

8 * 1 =  8 
8 * 2 =  16
8 * 3 =  24
8 * 4 =  32
8 * 5 =  40
8 * 6 =  48
8 * 7 =  56
8 * 8 =  64
8 * 9 =  72

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