2017-05-25 15:29:12 +03:00
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---
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language: HQ9+
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2017-05-25 15:29:39 +03:00
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filename: hq9+.html
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2017-05-25 15:29:12 +03:00
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contributors:
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- ["Alexey Nazaroff", "https://github.com/rogaven"]
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---
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HQ9+ is a joke programming language created by Cliff Biffle. It has only four commands and it isn't Turing-complete.
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```
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There is only 4 commands, represented by next characters
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H: print "Hello, world!"
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Q: print the program's source code (a Quine)
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9: print the lyrics to "99 Bottles of Beer"
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+: add one to the accumulator (the value of the accumulator cannot be accessed)
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Any other character is ignored.
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Ok. Let's write some program:
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HQ9
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Result:
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Hello world!
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HQ9
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HQ9+ is very simple, but allows you to do some things that are very difficult
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in other languages. For example, here is a program that creates three copies of
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itself on the screen:
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QQQ
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This produces:
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QQQ
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QQQ
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QQQ
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```
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And that's all. There are a lot of interpreters for HQ9+. Below you can find one of them
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+ [One of online interpreters](https://almnet.de/esolang/hq9plus.php)
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+ [HQ9+ official website](http://cliffle.com/esoterica/hq9plus.html)
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