The Raku Programming Language


Hi, my name is Camelia. I'm the spokesbug for the Raku Programming Language. Raku has been developed by a team of dedicated and enthusiastic open source volunteers, and continues to be developed. You can help too. The only requirement is that you know how to be nice to all kinds of people (and butterflies). Go to #raku ( and someone will be glad to help you get started.

Jump in!

Rakudo™ is a compiler for Raku code. Install it and you're all set to run Raku programs!

Download Rakudo

Many new features greatly advance our tradition of expressive and feature-rich programming

  • Object-oriented programming including generics, roles and multiple dispatch
  • Functional programming primitives, lazy and eager list evaluation, junctions, autothreading and hyperoperators (vector operators)
  • Parallelism, concurrency, and asynchrony including multi-core support
  • Definable grammars for pattern matching and generalized string processing
  • Optional and gradual typing
grammar Parser {
    rule  TOP  { I <love> <lang> }
    token love { '' | love }
    token lang { < Raku Perl Rust Go Python Ruby > }

say Parser.parse: 'I ♥ Raku';
# OUTPUT: 「I ♥ Raku」 love => 「♥」 lang => 「Raku」

say Parser.parse: 'I love Perl';
# OUTPUT: 「I love Perl」 love => 「love」 lang => 「Perl」
start { sleep 1.5; print "hi" }
await Supply.from-list(<A B C D E F>).throttle: 2, {
    sleep 0.5;

# No floating point noise:
say 0.1 + 0.2 == 0.3;        # OUTPUT: True
say (1/13 + 3/7 + 3/8).raku; # OUTPUT:  <641/728>
# Infinite list of primes:
my @primes = ^.grep: *.is-prime;
say "1001ˢᵗ prime is @primes[1000]";

# Lazily read words from a file
.say for '50TB.file.txt'.IO.words;

Want to see more? Visit Raku examples page

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