for i in range(1,10):    for j in range(1,i+1):        print("%dX%d=%-2d"%(i,j,i*j),end=" ")    print()

1X1=1  2X1=2  2X2=4  3X1=3  3X2=6  3X3=9  4X1=4  4X2=8  4X3=12 4X4=16 5X1=5  5X2=10 5X3=15 5X4=20 5X5=25 6X1=6  6X2=12 6X3=18 6X4=24 6X5=30 6X6=36 7X1=7  7X2=14 7X3=21 7X4=28 7X5=35 7X6=42 7X7=49 8X1=8  8X2=16 8X3=24 8X4=32 8X5=40 8X6=48 8X7=56 8X8=64 9X1=9  9X2=18 9X3=27 9X4=36 9X5=45 9X6=54 9X7=63 9X8=72 9X9=81 关键点：for循环嵌套，格式化，print函数。

 

 

 

 

 

 

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