九九乘法表Python 输出结果是上三角

可以使用双重循环语句来输出九九乘法表，其中外层循环控制行数，内层循环控制每行输出的乘积。输出的结果是上三角形式，可以使用字符串的格式化来控制输出格式。

代码如下：

for i in range(1, 10):
    for j in range(i, 10):
        print("{} x {} = {:2}  ".format(i, j, i * j), end='')
    print()

输出结果：

1 x 1 =  1  1 x 2 =  2  1 x 3 =  3  1 x 4 =  4  1 x 5 =  5  1 x 6 =  6  1 x 7 =  7  1 x 8 =  8  1 x 9 =  9  
2 x 2 =  4  2 x 3 =  6  2 x 4 =  8  2 x 5 = 10  2 x 6 = 12  2 x 7 = 14  2 x 8 = 16  2 x 9 = 18  
3 x 3 =  9  3 x 4 = 12  3 x 5 = 15  3 x 6 = 18  3 x 7 = 21  3 x 8 = 24  3 x 9 = 27  
4 x 4 = 16  4 x 5 = 20  4 x 6 = 24  4 x 7 = 28  4 x 8 = 32  4 x 9 = 36  
5 x 5 = 25  5 x 6 = 30  5 x 7 = 35  5 x 8 = 40  5 x 9 = 45  
6 x 6 = 36  6 x 7 = 42  6 x 8 = 48  6 x 9 = 54  
7 x 7 = 49  7 x 8 = 56  7 x 9 = 63  
8 x 8 = 64  8 x 9 = 72  
9 x 9 = 81