U+03AF "ί" Greek Small Letter Iota with Tonos Unicode Character
Unicode Version 17.0
ί
U+03AF "ί" Greek Small Letter Iota with Tonos is a lowercase vowel used in the Greek alphabet, specifically representing the letter iota when it carries a tonos, which is a stress accent mark. This character is part of the Greek and Coptic block and is essential for accurately writing modern Greek, as the tonos indicates the stressed syllable in a word, distinguishing it from the plain iota (U+03B9) used in unstressed positions. Its visual form resembles a small vertical line with a diacritical stroke above it, and it should not be confused with similar-looking characters like the Latin letter i with an acute accent, as they belong to different writing systems and have distinct Unicode code points.
General Properties
| Code Point | U+03AF |
| Version Added | 1.1 |
| Name | Greek Small Letter Iota with Tonos |
| Unicode 1.0 Name | Greek Small Letter Iota Tonos |
| Block | Greek and Coptic |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "ι" U+03B9 Greek Small Letter Iota "́" U+0301 Combining Acute Accent |
Encodings
| HTML Decimal Encoding | ί |
| HTML Hex Encoding | ί |
| UTF-8 Encoding | 0xCE 0xAF |
| UTF-16 Encoding | 0x03AF |
| UTF-32 Encoding | 0x000003AF |
| C/C++/Java Escape | \u03af |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ί" U+038A Greek Capital Letter Iota with Tonos |
| Simple Titlecase Code Point | "Ί" U+038A Greek Capital Letter Iota with Tonos |
| Uppercase Code Point | "Ί" U+038A Greek Capital Letter Iota with Tonos |
| Titlecase Code Point | "Ί" U+038A Greek Capital Letter Iota with Tonos |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| Script | Greek |
| Script Extensions | Greek |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Lower |