#循环: #1.while死循环(while语句+条件 )#当while后面的条件成立(True),才会执行它下面的代码#while True: #当真的时候,因为是默认为真,所以这是个死循环# print("acv") #conter = 0#while True:# counter+=1 #一样死循环#1.'输入密码,登陆'counter = 0while counter < 3: yonghuming = input("账号:") password = input ("密码:") if yonghuming =="leng" and password =="520": print("欢迎进入:") break else: print("输多一次:") counter += 1 if counter == 3: jixu = input("还继续吗[y/n]") if jixu =="y": counter=0else: print("输入太多次了.")
来源：https://www.cnblogs.com/Black-sail/p/11546626.html