3 Goodbye world is a [program](program.md) that is in some sense an opposite of the traditional [hello world](hello_world.md) program. What exactly this means is not strictly given, but some possibilities are:
5 - It just prints *goodbye world*, the programmer writes the program and never touches the language again.
6 - It is the last program a programmer writes before death, either unknowingly or possibly as a [suicide](suicide.md) note.
7 - Just as hello world shows the very basics of a language, a goodbye world may showcase the most advanced or masterful concepts of the language.
8 - It is a program that erases itself or possibly the whole [operating system](os.md) etc.