python实现20以内加法表

可以使用两个嵌套的 for 循环来实现：

for i in range(1, 21):
    for j in range(1, 21):
        print("{} + {} = {}".format(i, j, i+j))

输出结果为：

1 + 1 = 2
1 + 2 = 3
1 + 3 = 4
...
20 + 18 = 38
20 + 19 = 39
20 + 20 = 40

相关问题

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

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：

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

用python实现5以内的加法代码

你可以尝试这样的Python代码：a = int(input('请输入第一个数字：'))
b = int(input('请输入第二个数字：'))if (a <= 5) and (b <= 5):
c = a + b
print('结果是：', c)
else:
print('输入的数字太大了！')