死循环
 这里True，代表1是真，0是假
i = 0
while True:
  i = i + 1
  if i == 50:
     print 'I have got to the round 50th!'
     continue
  if i>70:break
  print i
  
 死循环
i = 0
while True:
  i = i + 1
  if i == 5000000:
     print 'I have got to the round 50th!'
     break
#  if i>70:break
#  print i


两种方法打印10000000
方法一
i = 0
while i< 10000000:
     i = i + 1
     continue
print 'I have got to the round',i
#     break
#  if i>70:break
#  print 


方法二：
程序走完才走else，不然不走else
i = 0
while i< 10000000:
     i = i + 1
#     continue
else:
      print 'I have got to the round',i
#     break
#  if i>70:break
#  print i


while和for循环对比（一个道理）
i = 0
while i< 10000000:
     i = i + 1
#     continue
else:
      print 'I have got to the round',i
#     break
#  if i>70:break
#  print i
for i in range(100):
    print i
else:
    print 'The loop is done!'