How to set password for a .txt or Notepad file?

There are several ways to  password protect notepad or text file.
You can make a text file and protect it as passwoed protected zip file or rar file.
Or
You can downlod NoteBook App which has similar features to Notepad. NoteBook also has some advance features which Microsoft Notepad does not. It also has features to save your text file with password protection.
Downlod NoteBook App From Attachment
File Size 416 KB