反向九九乘法表python

反向九九乘法表是指将九九乘法表中的数字倒序输出。在Python中，可以使用嵌套循环来实现反向九九乘法表的打印。以下是一个示例代码：

for i in range(9, 0, -1):
    for j in range(i, 0, -1):
        print(f"{i} * {j} = {i*j}", end="\t")
    print()

这段代码中，外层循环控制行数，从9到1递减。内层循环控制每行的列数，从当前行数递减到1。通过`print()`函数打印每个乘法表达式，并使用`\t`进行分隔。

运行以上代码，将会输出如下的反向九九乘法表：

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