TITLE

AUTHOR

Using the in-built capabilities of your language, calculate the integer
value of:


Confirm that the first and last twenty digits of the answer are:
62060698786608744707...92256259918212890625


Find and show the number of decimal digits in the answer.


head

L<http://rosettacode.org/wiki/Arbitrary-precision_integers_(included)#Raku>


item

code

=begin code :lang<raku>
use v6;



my $x = ~[**] 5, 4, 3, 2;
say "5**4**3**2 = {substr($x,0,20)}...{substr($x,$x.chars-20)} and has {$x.chars} digits";

# vim: expandtab shiftwidth=4 ft=perl6

=end code


root

100 Doors


100-doors.pl

24 game


24-game.pl

Accumulator factory


accumulator-factory.pl

Ackermann function


ackermann-function.pl

Balanced brackets


balanced-brackets.pl

Binomial Coefficient


binomial-coefficient.pl

Copy a string


copy-a-string.pl

Create a two-dimensional array at runtime


create-a-two-dimensional-array-at-runtime.pl

Hailstone sequence


hailstone-sequence.pl

Last fridays of the year


last-fridays-of-year.pl

Prime decomposition


prime-decomposition.pl

README.md

para

L<Examples| file:../examples/index.podlite>


L<Download |file:../download/index.podlite>


React

=begin React :component<HeaderCol> :id<menu> 
=para L<Documentation|/doc/introduction>
=para L<Modules| /mods>
=para L<Examples| file:../examples/index.podlite>
=para L<Download |file:../download/index.podlite>
=para L<About|file:../about/index.podlite>
=para 🔍 K<⌘K>/K<ctrl-K>
=end React


HEADER

FOOTER

Arbitrary-precision integers (included)


Generate a string with N opening brackets (“[”) and N closing brackets
(“]”), in some arbitrary order.


Determine whether the generated string is balanced; that is, whether it
consists entirely of pairs of opening/closing brackets (in that order), none
of which mis-nest.


L<http://rosettacode.org/wiki/Balanced_brackets#Raku>


=begin code :lang<raku>
use v6;



my $n = prompt "Number of bracket pairs: ";

{
    sub balanced($s) {
        my $l = 0;
        for $s.comb {
            when "]" {
                --$l;
                return False if $l < 0;
            }
            when "[" {
                ++$l;
            }
        }
        return $l == 0;
    }

    my $s = (<[ ]> xx $n).pick(*).join;
    say "Using depth counter method";
    say "$s {balanced($s) ?? "is" !! "is not"} well-balanced";
}



{
    sub balanced($s) {
        .none < 0 and .[*-1] == 0
            given ([\+] '\\' «leg« $s.comb).cache;
    }

    my $s = <[ ]>.roll($n*2).join;
    say "Using an FP oriented method";
    say "$s { balanced($s) ?? "is" !! "is not" } well-balanced";
}



{
    sub balanced($_ is copy) {
        s:g/'[]'// while m/'[]'/;
        $_ eq '';
    }

    my $s = <[ ]>.roll($n*2).join;
    say "Using a string munging method";
    say "$s is", ' not' xx not balanced($s), " well-balanced";
}



{

    grammar BalBrack {
        token TOP { ^ <balanced>* $ };
        token balanced { '[]' | '[' ~ ']' <balanced> }
    }

    my $s = <[ ]>.roll($n*2).join;
    say "Parsing brackets with a grammer";
    say "$s { BalBrack.parse($s) ?? "is" !! "is not" } well-balanced";

}

# vim: expandtab shiftwidth=4 ft=perl6

=end code


arbitrary-precision-integers.pl

The Ackermann function is a classic recursive example in computer science.


L<http://rosettacode.org/wiki/Ackermann_function#Raku>


=begin code :lang<raku>
use v6;



sub A(Int $m, Int $n) {

    $m == 0  ??    $n + 1                   !!
    $n == 0  ??  A($m - 1, 1            )   !!
                 A($m - 1, A($m, $n - 1));

}
A(1, 2).say;

# vim: expandtab shiftwidth=4 ft=perl6

=end code


The Raku Knowledge Base


=begin React :component<HeaderCol> :id<footer>  
=begin nested :!nested
=item1 B<Language>
    =item2 L<Get started|file:../getting-started/getting-started.podlite>
    =item2 L<Why Raku?|/doc/language/faq#Why-should-I-learn-Raku-What's-so-great-about-it>
    =item2 L<Try Raku|https://glot.io/new/raku>
    =item2 L<Raku cheat sheet|https://github.com/Raku/mu/blob/master/docs/Perl6/Cheatsheet/cheatsheet.txt>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<Raku on Exercism|https://exercism.org/tracks/raku>
    =item2 L<Wikipedia|https://en.wikipedia.org/wiki/Raku_(programming_language)>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=begin nested :!nested

=item1 B<L<Documentation|/doc>>
    =item2 L<Getting started, Migration guides from other languages, & Tutorials | file:../doc/introduction.podlite>
    =item2 L<Language References|file:../doc/reference.podlite>
    =item2 L<Type Reference| file:../doc/types.podlite>
    =item2 L<Miscellaneous| file:../doc/miscellaneous.podlite>
    =item2 L<FAQs (Frequently Asked Questions)|/doc/language/faq>
    =item2 L<Community|/doc/language/community>
    =item2 L<The list of all documents|file:../doc/index.podlite>

=item1 B<Resources>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>

=end nested
=begin nested :!nested

=item1 B<Resoures>
    =item2 L<Download | file:../download/index.podlite>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=item1 B<Learning>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Wikibook |https://en.wikibooks.org/wiki/Raku_Programming>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>
    =item2 L<Learn Raku in Y minutes|https://learnxinyminutes.com/docs/raku/>
    =item2 L<Golfing |https://github.com/AlexDaniel/raku-golf-cheatsheet>
=end nested
=begin nested :!nested

=item1 B<Explore>
    =item2 L<Raku Blog Aggregator|https://planet.raku.org/>
    =item2 L<Rakudo Weekly|https://rakudoweekly.blog/>
    =item2 L<The Weekly Challenge |https://perlweeklychallenge.org/>
    =item2 L<Raku Advent Calendar|https://raku-advent.blog/>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=end React


=begin React :component<CookieConsent> :id<CookieConsent> :buttonCaption("Got it!")
=para
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=end React


Arbitrary-precision integers (included)

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