python实现倒写九九乘法表

一.python实现九九乘法表

基本实现看此链接就行: python实现九九乘法表，实现九九乘法表主要抓住内循环和外循环就行，理解了内外循环，代码实现也就更加容易。

二.倒写九九乘法表

第一种
1. 代码1

i=9
while i<=9:
    j=1
    while j<=i:
        print(i,"*",j,"=",i*j,end=" ")
        j=j+1
    print()
    i=i-1
    if i==0:
        break
        

代码2

i=9
while i>=1:
    j=1
    while j<=i:
        print(i,"*",j,"=",i*j,end=" ")
        j=j+1
    print()
    i=i-1
        

结果

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

第二种
代码如下：

i = 1
while i <= 9:
    j =9
    while j >= i:
        print(j, "*", i, "=", j * i, end = " ")
        j -= 1
    print()
    i += 1      

结果：

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