python实现20以内加法表每列的第一个加数相同,每行的第二个加数相同
时间: 2024-05-04 14:20:47 浏览: 14
可以使用双重循环来实现这个加法表,其中外层循环控制第一个加数,内层循环控制第二个加数。
代码如下:
```python
for i in range(1, 21):
for j in range(i, 21, i):
print("{:2d} + {:2d} = {:2d}".format(i, j-i, j))
print()
```
输出结果如下:
```
1 + 0 = 1
1 + 1 = 2
1 + 2 = 3
1 + 3 = 4
1 + 4 = 5
1 + 5 = 6
1 + 6 = 7
1 + 7 = 8
1 + 8 = 9
1 + 9 = 10
1 + 10 = 11
1 + 11 = 12
1 + 12 = 13
1 + 13 = 14
1 + 14 = 15
1 + 15 = 16
1 + 16 = 17
1 + 17 = 18
1 + 18 = 19
1 + 19 = 20
2 + 0 = 2
2 + 2 = 4
2 + 4 = 6
2 + 6 = 8
2 + 8 = 10
2 + 10 = 12
2 + 12 = 14
2 + 14 = 16
2 + 16 = 18
2 + 18 = 20
3 + 0 = 3
3 + 3 = 6
3 + 6 = 9
3 + 9 = 12
3 + 12 = 15
3 + 15 = 18
4 + 0 = 4
4 + 4 = 8
4 + 8 = 12
4 + 12 = 16
4 + 16 = 20
5 + 0 = 5
5 + 5 = 10
5 + 10 = 15
5 + 15 = 20
6 + 0 = 6
6 + 6 = 12
6 + 12 = 18
7 + 0 = 7
7 + 7 = 14
8 + 0 = 8
8 + 8 = 16
9 + 0 = 9
9 + 9 = 18
10 + 0 = 10
10 + 10 = 20
11 + 0 = 11
12 + 0 = 12
13 + 0 = 13
14 + 0 = 14
15 + 0 = 15
16 + 0 = 16
17 + 0 = 17
18 + 0 = 18
19 + 0 = 19
20 + 0 = 20
```