https://www.cnblogs.com/suiy-160428/p/5594389.html
for x in range(1,10): for y in range(x,10): print('%d*%d=%2d' %(x,y,x*y),end=' ') print (" ")
https://www.cnblogs.com/suiy-160428/p/5594389.html
for x in range(1,10): for y in range(x,10): print('%d*%d=%2d' %(x,y,x*y),end=' ') print (" ")