如何用while循环 输出一个九九乘法表

Posted 2020-10-14 Mr-Lee-long

方法一

 1 i = 1   
 2 while i < 10:
 3     k = 1
 4     while k <= i:
 5         print(‘%d*%d=%2d   ‘% (i,k,i*k),end=‘‘) #end=‘’  表示不换行（系统默认输出完毕换行）
 6         k += 1
 7     print()
 8     i += 1
 9 
10 
11 输出结果
12 1*1= 1   
13 2*1= 2   2*2= 4   
14 3*1= 3   3*2= 6   3*3= 9   
15 4*1= 4   4*2= 8   4*3=12   4*4=16   
16 5*1= 5   5*2=10   5*3=15   5*4=20   5*5=25   
17 6*1= 6   6*2=12   6*3=18   6*4=24   6*5=30   6*6=36   
18 7*1= 7   7*2=14   7*3=21   7*4=28   7*5=35   7*6=42   7*7=49   
19 8*1= 8   8*2=16   8*3=24   8*4=32   8*5=40   8*6=48   8*7=56   8*8=64   
20 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 

方法二

 1 a = 9
 2 while a > 0:
 3     i = 1
 4     while i <= a:
 5 
 6         print(‘%d * %d = %2d  ‘%(a,i,a*i),end= ‘‘)
 7         i += 1
 8     print()
 9     a -= 1
10 
11 输出结果
12 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  
13 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  
14 8 * 1 =  8  8 * 2 = 16  8 * 3 = 24  8 * 4 = 32  8 * 5 = 40  8 * 6 = 48  8 * 7 = 56  8 * 8 = 64  
15 7 * 1 =  7  7 * 2 = 14  7 * 3 = 21  7 * 4 = 28  7 * 5 = 35  7 * 6 = 42  7 * 7 = 49  
16 6 * 1 =  6  6 * 2 = 12  6 * 3 = 18  6 * 4 = 24  6 * 5 = 30  6 * 6 = 36  
17 5 * 1 =  5  5 * 2 = 10  5 * 3 = 15  5 * 4 = 20  5 * 5 = 25  
18 4 * 1 =  4  4 * 2 =  8  4 * 3 = 12  4 * 4 = 16  
19 3 * 1 =  3  3 * 2 =  6  3 * 3 =  9  
20 2 * 1 =  2  2 * 2 =  4  
21 1 * 1 =  1