While循环 最简单的例子
Count = 0
While true:
Print(“count:”,count)
Count = count + 1 #count +=1
列子1
Age_of_oldboy =56
Count = 0 计数
While true：
If count ==3 执行3次退出
Break
Guess_age = int(input(“guess_age:”))
If guess_age ==age_of_oldboy :
Print(“yes you got it”)
Break 输入为真退出
Elif guess_age >age_of_oldboy:
Print(“think smaller”)
Else:
Print(“think bigger”)
Count +=1 计数
while列子2 优化版本
Age_of_oldboy =56
Count = 0 计数
While count < 3:
Guess_age = int(input(“guess_age:”))
If guess_age ==age_of_oldboy :
Print(“yes you got it”)
Break 输入为真退出
Elif guess_age >age_of_oldboy:
Print(“think smaller”)
Else:
Print(“think bigger”)
Count +=1 计数
Else:
Print(“you have tried too many times..fuck off”)
原文：http://www.cnblogs.com/bjwwjun/p/7118880.html