U+0640 "ـ" Arabic Tatweel Unicode Character
Unicode Version 17.0
ـ
U+0640 "ـ" Arabic Tatweel is a special typographic mark used in Arabic script to visually lengthen a word or to justify text by connecting letters without adding spaces. It appears as a horizontal dash-like stroke that can be inserted between the base letters of a word, allowing calligraphers and typesetters to adjust the spacing for aesthetic or alignment purposes in manuscripts and digital layouts. Unlike a standard character that represents a sound, the Tatweel has no phonetic value and is purely a formatting glyph, commonly employed in formal writing, signage, or traditional calligraphy to create a more balanced or decorative line of text.
General Properties
| Code Point | U+0640 |
| Version Added | 1.1 |
| Name | Arabic Tatweel |
| Block | Arabic |
| General Category | Modifier Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Arabic Letter |
Encodings
| HTML Decimal Encoding | ـ |
| HTML Hex Encoding | ـ |
| UTF-8 Encoding | 0xD9 0x80 |
| UTF-16 Encoding | 0x0640 |
| UTF-32 Encoding | 0x00000640 |
| C/C++/Java Escape | \u0640 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Joining Type | Join Causing |
| Line Break | Alphabetic |
| Case Ignorable | Yes |
| Script | Common |
| Script Extensions | Adlam Arabic Mandaic Manichaean Old Uyghur Psalter Pahlavi Hanifi Rohingya Sogdian Syriac |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Extender | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | OLetter |