python 输出99乘法表

i = 1
while i <= 9:
    i += 1
    j = 1
    while j <= i-1:
        print("{}*{}=".format(j,i-1),j*(i-1),sep='',end=' ')
        j += 1
    print('')

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

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