U+2115 "ℕ" Double-Struck Capital N Unicode Character
Unicode Version 17.0
ℕ
U+2115 "ℕ" Double-Struck Capital N is a typographic symbol that represents the set of natural numbers in mathematical notation. It belongs to the block known as Letterlike Symbols and is designed in a blackboard bold style, which is commonly used in mathematics and logic to denote number systems. This character helps distinguish the set of natural numbers from an ordinary letter N, making it useful in textbooks, academic papers, and digital documents where precise mathematical communication is required. Its inclusion in Unicode ensures consistent representation across different platforms and fonts.
General Properties
| Code Point | U+2115 |
| Version Added | 1.1 |
| Name | Double-Struck Capital N |
| Unicode 1.0 Name | Double-Struck N |
| Block | Letterlike Symbols |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Font |
| Decomposition Mapping | "N" U+004E Latin Capital Letter N |
Encodings
| HTML Decimal Encoding | ℕ |
| HTML Hex Encoding | ℕ |
| UTF-8 Encoding | 0xE2 0x84 0x95 |
| UTF-16 Encoding | 0x2115 |
| UTF-32 Encoding | 0x00002115 |
| C/C++/Java Escape | \u2115 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Uppercase | Yes |
| Cased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "n" U+006E Latin Small Letter N |
| NFKC Simple Casefold | "n" U+006E Latin Small Letter N |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Math | Yes |
| Other Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Upper |