python loop while and for in examples

#!/uer/bin/env python
# _*_ coding: utf-8 _*_

lucknumber = 5
b = 0

while b <3:
  print(&#39;guss count:&#39;,b)
  a = int(input(&#39;you guse number&#39;))
  if a > lucknumber:
    print (&#39;youaerbiger&#39;)
  elif a == lucknumber:
    print (&#39;youare righet&#39;)
    break                 #跳出这个层级的循环
  else :
    print (&#39;you aer smaller&#39;)
  b +=1                  #在while循环中，+=1 是必须循环体
else:
  print ("Too many retrys!")

#________________________________________________

for i in range(3):
  a = int(input(&#39;you guse number&#39;))   #注意用int（）表示输出的是 数字类型
  if a > lucknumber:
    print (&#39;youaerbiger&#39;)
  elif a == lucknumber:
    print (&#39;youare righet&#39;)
    break
  else :
    print (&#39;you aer smaller&#39;)
else:
  print ("Too many retrys!")