save project

lk.py

+Username="python"
+userpassword="123456"
+while True:
+    name = input("请输入用户名：")
+    password = input("请输入密码：")
+    if name == Username and password == userpassword:
+        print("登录成功！")
+        break
+    if name !=Username:
+        print("用户名错误，请重新输入！")
+        continue
+    if password != userpassword:
+        print("密码输入有误，请重新输入！")
+print("欢迎来到贝尔编程！")
\ No newline at end of file