user
Task

1. Describe, and give a pointer to documentation on your languages use of characters *beyond* those of the ASCII character set in the naming of variables.
2. Show how to:

:   * Set a variable with a name including the 'Δ', (delta *character*), to 1
    * Increment it
    * Print its value.

Related task

* Case-sensitivity of identifiers
assistant
(formerly Perl 6)
Raku is written in Unicode so, with narrow restrictions, nearly any Unicode letter can be used in identifiers.

See the current Raku documentation on the topic here: https://docs.raku.org/language/syntax#Identifiers

```
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:**  
Egyptian division