save project

diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")#将输入的账号赋值给user变量
+    password = input("请输入密码:")#将输入的密码赋值给user变量
+    if name == username and password == userpassword:#对比账号密码
+        print("登录成功!")
+        print("欢迎来到编程世界")
+        break#跳出循环
+    if name!=username:
+        print("用户名错误")
+    elif password!=userpassword:
+        print("密码输入错误")
+    
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