Nil is the world's first Nihilistic programming language. Essentially, it parses commands of any complexity, and then ignores them.
Here is the traditional Nil program:
I wandered lonely as a cloud.
A more practical program:
Please, give a NOP if life is either meaningful or not meaningful.
The shortest known Nil quine:
One of the most widely deployed Nil interpreters is true, which is shipped as standard with many popular operating systems including GNU/Linux and Mac OS X. The traditional Nil program above (wordsworth.nil) can be invoked thus:
Alternatively, since the language syntax allows the use of 'shebang' lines, Nil programmers may wish to adopt the following convention to make their programs directly executable:
#!/usr/bin/true -w I wandered lonely as a cloud.
Notice the use of the -w option in the above example, which turns on compiler warnings; novice Nil programmers are strongly encouraged to make use of this feature.
Incredibly, despite not being Turing-complete, the Nil language is expressive enough to implement an interpreter for itself, much more concisely than many 'proper' languages can. The example presented here is a simple implementation, but using advanced compression techniques Nil developers have been able to produce working interpreters in as little as 0 lines of code.
#!/usr/bin/true -w My mother had a Flit gun 'Twas not devoid of charm A bit of Flit Shot out of it; The rest shot up her arm
This can be seen to run any Nil program successfully, including our example programs from above:
> ./nil_interpreter.nil wordsworth.nil > ./nil_interpreter.nil quine.nil