打印99乘法表是一个非常经典的循环案例题,下次我用三种方法进行输出演示
方法1
双for循环,灵活运用end=进行“取消换行符”以及print()进行内层循环结束后的换行形成三角99乘法表。
for a in range(1,10):for b in range(1,a+1):print(f'{b}x{a}={a*b}',end=' ')print()
运行结果如下:
1x1=1
1x2=2 2x2=4
1x3=3 2x3=6 3x3=9
1x4=4 2x4=8 3x4=12 4x4=16
1x5=5 2x5=10 3x5=15 4x5=20 5x5=25
1x6=6 2x6=12 3x6=18 4x6=24 5x6=30 6x6=36
1x7=7 2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49
1x8=8 2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64
1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81
方法2
依旧使用双for循环,该方法使用字符串拼接进行输出:
for a in range(1,10):str_99=''for b in range(1,a+1):str_99+=f'{b}x{a}={a*b}'+' 'print(str_99)
运行结果如下:
1x1=1
1x2=2 2x2=4
1x3=3 2x3=6 3x3=9
1x4=4 2x4=8 3x4=12 4x4=16
1x5=5 2x5=10 3x5=15 4x5=20 5x5=25
1x6=6 2x6=12 3x6=18 4x6=24 5x6=30 6x6=36
1x7=7 2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49
1x8=8 2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64
1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81
方法3
使用双for循环,用列表进行输出
for a in range(1,10):list_99=[]for b in range(1,a+1):list_99.append(f'{b}x{a}={a*b}')print(list_99)
运行结果如下:
['1x1=1']
['1x2=2', '2x2=4']
['1x3=3', '2x3=6', '3x3=9']
['1x4=4', '2x4=8', '3x4=12', '4x4=16']
['1x5=5', '2x5=10', '3x5=15', '4x5=20', '5x5=25']
['1x6=6', '2x6=12', '3x6=18', '4x6=24', '5x6=30', '6x6=36']
['1x7=7', '2x7=14', '3x7=21', '4x7=28', '5x7=35', '6x7=42', '7x7=49']
['1x8=8', '2x8=16', '3x8=24', '4x8=32', '5x8=40', '6x8=48', '7x8=56', '8x8=64']
['1x9=9', '2x9=18', '3x9=27', '4x9=36', '5x9=45', '6x9=54', '7x9=63', '8x9=72', '9x9=81']
如果猿友们有其他想法可以在评论区交流哦!