0x211C

0x211C is the hexadecimal notation for the Unicode code point U+211C, which is named BLACK-LETTER CAPITAL R. It is part of the Unicode block called Letterlike Symbols (spanning roughly from 2100 to 214F) and represents a capital R rendered in a blackletter (Fraktur-like) typographic style. The symbol is primarily of typographic interest and does not carry a universal mathematical meaning in the way that some related symbols do.

A closely related character is U+211D, the DOUBLE-STRUCK CAPITAL R (ℝ), which is commonly used in mathematics to denote the set of real numbers in many fonts. U+211C and U+211D are distinct symbols with different visual origins. In practical use, 0x211C can be rendered in HTML as either ℜ or ℜ; however, font support varies, and many environments may substitute a plain R if the blackletter glyph is unavailable.