python3中print函数中的参数end默认值为’\n’，表示换行，改变end的赋值，就不会换行了，例如打印个99乘法表：
for
i
in
range(
1
,
10
):
print
()
for
j
in
range(
1
, i+
1
):
print
(
"%d*%d=%d,"
% (i, j, i*j),
end
=
' '
)
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
,
