第三段代码中if语句是怎么比较字符串大小的?
print('第一种')
for x in range(1,9):
for y in range(x+1,10):
print(str(x) + str(y))
print('第二种')
for x in range(1,9):
for y in range(1,10):
if x < y:
print(x*10 + y)
print('第三种')
for x in['1','2','3','4','5','6','7','8']:
for y in ['1','2','3','4','5','6','7','8','9']:
if x < y:#这里的字符串是如何比较大小的?
print(x+y)
print('第四种')
for x in[1,2,3,4,5,6,7,8]:
for y in [1,2,3,4,5,6,7,8,9]:
if x < y:
print(x*10+y)
