> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/q/quine.md).

# Quine

With printf():

```ruby
s = %(s = %%(%s); printf(s, s);
); printf(s, s);
```

With HERE-doc:

```ruby
say(<<e*2, 'e')
say(<<e*2, 'e')
e
```