python 循环while和for in简单实例

python循环while和forin简单实例#!/uer/bin/envpython#_*_coding:utf-8_*_lucknumber=5b=0whileb<3:print('gusscount:

python 循环while和for in简单实例

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

lucknumber = 5
b = 0

while b <3:
 print('guss count:',b)
 a = int(input('you guse number'))
 if a > lucknumber:
 print ('youaerbiger')
 elif a == lucknumber:
 print ('youare righet')
 break #跳出这个层级的循环
 else :
 print ('you aer smaller')
 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('you guse number')) #注意用int（）表示输出的是 数字类型
 if a > lucknumber:
 print ('youaerbiger')
 elif a == lucknumber:
 print ('youare righet')
 break
 else :
 print ('you aer smaller')
else:
 print ("Too many retrys!")

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