从0到9遍历,如果包含5就打印出found it,否则打印 not found it
for i in range(10):
if i == 5:
print 'found it! i = %s' % i
else:
print 'not found it ...'
在以上for的可执行内容为空的时候,默认执行else后的子句
for i in range(10):
if i == 5:
print 'found it! i = %s' % i
break
else:
print 'not found it ...'
break 跳出整个循环体不再执行 i > 5以后的语句
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