Firecracker microVM live per-test verdicts multi-file compile
Raku (renamed from Perl 6 in 2019) is a distinct language with a much richer type system, first-class grammars, junctions, and lazy lists. Slower than Perl 5 but far more expressive.
Starter code
What you get in Raku
Clicking "Run now" opens the playground with this exact code and a matching test case pre-loaded — passes on first Run.
rakuRaku 0
my $n = get.trim.Int;
say $n * 2;
stdin →21
expected →42
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FAQ
Common questions about Raku on ls-judge
Is this Perl 6?
Same language, new name. It was renamed to Raku in 2019 to signal it is not source-compatible with Perl 5.
zef packages?
No network — core Raku only.
Rakudo?
Yes — Rakudo is the reference Raku implementation.