Unicode variable names
Perl 6 is written in Unicode so, with narrow restrictions, nearly any Unicode letter can be used in identifiers.
See Perl 6 Synopsis 02. - http://perlcabal.org/syn/S02.html#Names
my $Δ = 1;
$Δ++;
say $Δ;
Function and subroutine names can also use Unicode characters: (as can methods, classes, packages, whatever...)
my @ᐁ = (0, 45, 60, 90);
sub π { pi };
sub postfix:<°>($degrees) { $degrees * π / 180 };
for @ᐁ -> $ಠ_ಠ { say sin $ಠ_ಠ° };
sub c͓͈̃͂̋̈̆̽h̥̪͕ͣ͛̊aͨͣ̍͞ơ̱͔̖͖̑̽ș̻̥ͬ̃̈ͩ { 'HE COMES' }
See Also: