U+21CE "⇎" Left Right Double Arrow with Stroke Unicode Character
Unicode Version 17.0
⇎
U+21CE "⇎" Left Right Double Arrow with Stroke is a mathematical symbol used primarily in logic and mathematics to denote the "not equivalent" relation, representing the negation of a bidirectional logical equivalence. It combines a left-right double arrow with a diagonal stroke through its center, visually indicating that two statements or values are not mutually implied. This character is part of the Arrows block in Unicode and is commonly employed in formal proofs, set theory, and computer science contexts to express inequality or the failure of a biconditional relationship.
General Properties
| Code Point | U+21CE |
| Version Added | 1.1 |
| Name | Left Right Double Arrow with Stroke |
| Block | Arrows |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Decomposition Type | Canonical |
| Decomposition Mapping | "⇔" U+21D4 Left Right Double Arrow "̸" U+0338 Combining Long Solidus Overlay |
Encodings
| HTML Decimal Encoding | ⇎ |
| HTML Hex Encoding | ⇎ |
| UTF-8 Encoding | 0xE2 0x87 0x8E |
| UTF-16 Encoding | 0x21CE |
| UTF-32 Encoding | 0x000021CE |
| C/C++/Java Escape | \u21ce |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |