python 输出99乘法表

for i in range(1,10):
    for j in range(1,i+1):
        print("%s*%s=%2s"%(i,j,i*j),end="  ")
    print('')

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

for i in range(1, 10):
    for j in range(1,i+1):
        print("{}*{}={}".format(i,j,i*j),end="  ")
    print('')