- input 输入
- print 输出
- for 循环
for x in range(0,6): if x<3: print(" x:",x) else: continue print(" hello")
4. while 循环
print("欢迎登录,请输入您的帐号及密码(3次机会): ") name = "王强" pwd = "123" i = 0 #计数器 while i<3: username = input(" 账号:") userpwd = input(" 密码:") if username == name: if userpwd == pwd: print(" ——登录成功——") break else: print(" *密码错误*") else: print(" *账号错误*") i+=1 else: print(" * * * 请明天再来 * * *")
- break:跳出循环;
- continue:跳出本次循环;