python循环结构中的else怎么使用

循环组合中的else执行的情况下是循环正常结束（即不是使用break退出）。如下列代码：

numbers=[1,2,3,4,5]
forninnumbers:
if(n>5):
print('thevalueis%d'%(n))
break
else:
print('theforloopdoesnotendwithbreak')

i=0
while(numbers[i]<5):
print('theindex%dvalueis%d'%(i,numbers[i]))
if(numbers[i]<0):
break
i=i+1
else:
print('theloopdoesnotendwithbreak')

numbers=[1,2,3,4,5]
forninnumbers:
if(n>5):
print('thevalueis%d'%(n))
break
else:
print('theforloopdoesnotendwithbreak')

i=0
while(numbers[i]<5):
print('theindex%dvalueis%d'%(i,numbers[i]))
if(numbers[i]<0):
break
i=i+1
else:
print('theloopdoesnotendwithbreak')

执行结果如下：

C:\Python27>python.exefor_else.py
theforloopdoesnotendwithbreak
theindex0valueis1
theindex1valueis2
theindex2valueis3
theindex3valueis4
theloopdoesnotendwithbreak