U+222F "∯" Surface Integral Unicode Character
Unicode Version 17.0
∯
U+222F "∯" Surface Integral is a mathematical symbol used to denote integration over a two dimensional surface in three dimensional space, commonly applied in calculus, physics, and engineering to calculate flux through a closed or open surface, generalizing line integrals to areas.
General Properties
| Code Point | U+222F |
| Version Added | 1.1 |
| Name | Surface Integral |
| Block | Mathematical Operators |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Mirrored | Yes |
| Decomposition Type | Compat |
| Decomposition Mapping | "∮" U+222E Contour Integral "∮" U+222E Contour Integral |
Encodings
| HTML Decimal Encoding | ∯ |
| HTML Hex Encoding | ∯ |
| UTF-8 Encoding | 0xE2 0x88 0xAF |
| UTF-16 Encoding | 0x222F |
| UTF-32 Encoding | 0x0000222F |
| C/C++/Java Escape | \u222f |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "∮" U+222E Contour Integral "∮" U+222E Contour Integral |
| NFKC Simple Casefold | "∮" U+222E Contour Integral "∮" U+222E Contour Integral |
| 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 |