U+33D1 "㏑" Square Ln Unicode Character
Unicode Version 17.0
㏑
U+33D1 "㏑" Square Ln is a CJK compatibility ideograph that represents the mathematical abbreviation for the natural logarithm, typically displayed as the letters "Ln" enclosed within a square box. This character was specifically designed for compatibility with legacy East Asian encoding standards, such as those used in Japanese text processing, where it served as a single glyph to denote the logarithmic function in contexts like scientific notation or technical documentation. While it is rarely used in modern computing, it remains part of Unicode's compatibility set to ensure faithful conversion of older documents.
General Properties
| Code Point | U+33D1 |
| Version Added | 1.1 |
| Name | Square Ln |
| Unicode 1.0 Name | Squared Ln |
| Block | CJK Compatibility |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Square |
| Decomposition Mapping | "l" U+006C Latin Small Letter L "n" U+006E Latin Small Letter N |
Encodings
| HTML Decimal Encoding | ㏑ |
| HTML Hex Encoding | ㏑ |
| UTF-8 Encoding | 0xE3 0x8F 0x91 |
| UTF-16 Encoding | 0x33D1 |
| UTF-32 Encoding | 0x000033D1 |
| C/C++/Java Escape | \u33d1 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Ideographic |
| East Asian Width | Wide |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "l" U+006C Latin Small Letter L "n" U+006E Latin Small Letter N |
| NFKC Simple Casefold | "l" U+006C Latin Small Letter L "n" U+006E Latin Small Letter N |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |