为什么X没有乘以10,运行结果也是正确的呢?
for x in [ '1','2','3','4','5','6','7','8','9' ]:
for y in [ '0','1','2','3','4','5','6','7','8','9' ]:
if x<y:
print x+y
for x in [ '1','2','3','4','5','6','7','8','9' ]:
for y in [ '0','1','2','3','4','5','6','7','8','9' ]:
if x<y:
print x+y
2018-02-28
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