U+2377 "⍷" Apl Functional Symbol Epsilon Underbar Unicode Character
Unicode Version 17.0
⍷
U+2377 "⍷" Apl Functional Symbol Epsilon Underbar is a glyph used in the APL programming language to represent a specific primitive function, often referred to as "epsilon underbar" or "set inclusion with membership test." Its primary role is to check whether each element of a right argument belongs to a left argument, returning a Boolean array that indicates membership. This symbol is part of APL's rich set of graphical operators, which rely on distinct visual cues like the underbar to differentiate related operations, such as the plain epsilon (∊) and its underbar variant. In practice, ⍷ provides a concise way to express logical filtering and set-like comparisons within APL's array-oriented paradigm.
General Properties
| Code Point | U+2377 |
| Version Added | 1.1 |
| Name | Apl Functional Symbol Epsilon Underbar |
| Block | Miscellaneous Technical |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
Encodings
| HTML Decimal Encoding | ⍷ |
| HTML Hex Encoding | ⍷ |
| UTF-8 Encoding | 0xE2 0x8D 0xB7 |
| UTF-16 Encoding | 0x2377 |
| UTF-32 Encoding | 0x00002377 |
| C/C++/Java Escape | \u2377 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |