auto save

diy2.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!")
-    print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
\ No newline at end of file
+# 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
+#     print("用户名和密码错误!请重新输入")
+# print("欢迎来到贝尔编程!")
+
+#使用for循环在[0,100]这个区间内每隔3个数值生成，当数值大于72时跳出循环
+for i in range(0,30,3):
+    if i == 15:
+        break
+    print(i)
+# for i in range(0,30,3):
+#     if i == 15:
+#         continue
+#     print(i)
+