The following Unicode symbols can be used in Perl 6 without needing to load any additional modules. Some of them have equivalents which can be typed with ASCII-only characters.

Reference is made below to various properties of unicode codepoints. The definitive list can be found here: https://www.unicode.org/Public/UCD/latest/ucd/PropList.txt.

Alphabetic characters

Any codepoint that has the Ll (Letter, lowercase), Lu (Letter, uppercase), Lt (Letter, titlecase), Lm (Letter, modifier), or the Lo (Letter, other) property can be used just like any other alphabetic character from the ASCII range.

my $Δ = 1;
$Δ++;
say $Δ;

Numeric characters

Any codepoint that has the Nd (Number, decimal digit) property, can be used as a digit in any number. For example:

my $var = １９; # U+FF11 U+FF19 
say $var + 2;  # OUTPUT: «21␤»

Numeric values

Any codepoint that has the No (Number, other) or Nl (Number, letter) property can be used standalone as a numeric value, such as ½ and ⅓. (These aren't decimal digit characters, so can't be combined.) For example:

my $var = ⅒ + 2 + Ⅻ; # here ⅒ is No and Rat and Ⅻ is Nl and Int 
say $var;            # OUTPUT: «14.1␤»

Whitespace characters

Besides spaces and tabs you can use any other unicode whitespace character that has the Zs (Separator, space), Zl (Separator, line), or Zp (Separator, paragraph) property.

Other acceptable single codepoints

This list contains the single codepoints [and their ASCII equivalents] that have a special meaning in Perl 6.

Atomic operators

The atomic operators have U+269B ⚛ ATOM SYMBOL incorporated into them. Their ASCII equivalents are ordinary subroutines, not operators:

my atomicint $x = 42;
$x⚛++;                # Unicode version 
atomic-fetch-inc($x); # ASCII version

The ASCII alternatives are as follows:

Multiple codepoints

This list contains multiple-codepoint operators that require special composition for their ASCII equivalents. Note the codepoints are shown space-separated but should be entered as adjacent codepoints when used.