U+1D7DF "𝟟" Mathematical Double-Struck Digit Seven Unicode Character
Unicode Version 17.0
U+1D7DF "𝟟" Mathematical Double-Struck Digit Seven is a stylized numeral from the Mathematical Alphanumeric Symbols block, designed for use in mathematical and scientific notation where a blackboard bold or double-struck style is needed, such as in setting theory, number theory, or algebra to differentiate a digit from ordinary text or to serve as a variable or constant in complex formulas. This character, like its double-struck digit counterparts, is not a typical typographic variant but a distinct code point intended for unambiguous representation in digital text, ensuring that it is displayed with a bold, hollow outline that mimics chalk on a slate board. Its standardized encoding allows mathematicians and technical writers to incorporate it uniformly across different software and platforms, providing a precise visual cue for specialized mathematical contexts.
General Properties
Encodings
| HTML Decimal Encoding |
𝟟 |
| HTML Hex Encoding |
𝟟 |
| UTF-8 Encoding |
0xF0 0x9D 0x9F 0x9F |
| UTF-16 Encoding |
0xD835 0xDFDF |
| UTF-32 Encoding |
0x0001D7DF |
| C/C++/Java Escape |
\ud835\udfdf |
Unicode Properties