【python】编程语言入门经典100例--8-白红宇

题目：输出9*9口诀

代码：

                         
  
2
  
3
for
i 
in
range
(
1
,
10
):
  
4
for
j 
in
range
(
1
,
10
):
  
5
if
j < i:
  
6
print
(
'%d*%d=%d '
%
(j,i,i
*
j),end 
=
'')       
  
7
elif
i 
=
=
j:
  
8
print
(
'%d*%d=%d'
%
(j,i,i
*
j))
        
      

运行结果：

                         
[root@HK code_100]
# python code_8.py
1
*
1
=
1
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
[root@HK code_100]
#
        
      

代码解释：

                         
 
3
for
i 
in
range
(
1
,
10
):         
#i取值1-9
  
4
for
j 
in
range
(
1
,
10
):      
#j取值1-9
  
5
if
j < i:                    
#当*之前的数小于*之后的数时
  
6
print
(
'%d*%d=%d '
%
(j,i,i
*
j),end 
=
'
')    # 打印乘法口诀，end='
' 表示输出不换行      
  
7
elif
i 
=
=
j:                                    
#当i == j的时候
  
8
print
(
'%d*%d=%d'
%
(j,i,i
*
j))        
#另起一行，换行输出
        
      
             本文转自snc_snc 51CTO博客，原文链接：http://blog.51cto.com/netsyscode/1743968，如需转载请自行联系原作者 