Double-struck Capital R Letter
ℝ is the double-struck capital R character (U+211D) used to represent number sets in a math-style look.
U+211D
ℝ (U+211D) is a decorative, stylized character commonly used in mathematical and typesetting contexts. It’s also handy in design and documentation when you want a clean, math-like “R” symbol. Copy it directly or use the provided HTML/CSS/JavaScript escapes.
Double-struck Capital R Letter Meaning
ℝ is the Unicode character “DOUBLE-STRUCK CAPITAL R” (U+211D). In many written contexts, it denotes the real numbers ℝ, using a double-struck typeface style typical of math notation. Because it’s a single, specific Unicode character (not just a normal “R”), it keeps consistent appearance across text when the font supports it. Beyond math, designers and writers sometimes use ℝ as a visual label, brand mark, or typographic accent where a distinctive “R” character is preferred.
Common uses
- •Writing math notes and notation for real numbers (ℝ)
- •Labeling charts or diagrams that describe a real-valued domain/range
- •Designing infographics and educational materials with math-style typography
- •Creating consistent typographic symbols in documents and slide decks
- •Using ℝ as a stylized “R” symbol in posters, web graphics, or UI mockups
Examples
ℝ Double-Struck Capital R Symbol
- ℝLet x ∈ ℝ.
- ℝy is a function from ℝ to ℝ.
- ℝThe domain is ℝ, and the range is ℝ.
- ℝChoose parameters in ℝ.
- ℝConsider values over ℝ.
Variations
Technical codes
| Unicode | U+211D | |
| HTML Entity | ℝ | |
| HTML Code | ℝ | |
| CSS | \211D | |
| Alt Code | Alt + 8477 | |
| Decimal | 8477 |
How to type Double-struck Capital R Letter (ℝ)
On Windows
Hold Alt and type 8477 on the numeric keypad. In Word, type 211D then press Alt + X.
On Mac
Switch to the Unicode Hex Input keyboard, then hold Option and type 211D. Or press Control + Command + Space and search.
On Linux
Press Control + Shift + U, type 211d, then press Enter or Space.
Anywhere
Copy ℝ with the button above and paste it wherever you need it — this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What does the Double-struck Capital R letter mean?
ℝ is the Unicode character “DOUBLE-STRUCK CAPITAL R” (U+211D). In many written contexts, it denotes the real numbers ℝ, using a double-struck typeface style typical of math notation. Because it’s a single, specific Unicode character (not just a normal “R”), it keeps consistent appearance across text when the font supports it. Beyond math, designers and writers sometimes use ℝ as a visual label, brand mark, or typographic accent where a distinctive “R” character is preferred.
What Unicode character is ℝ?
ℝ is the Unicode character DOUBLE-STRUCK CAPITAL R with code point U+211D.
How can I copy ℝ into HTML?
You can use the HTML entity: ℝ (as provided).
How do I include ℝ in CSS or stylesheets?
Use the CSS escape: \\211D.
Does ℝ always display correctly on every device?
It depends on font support. If your font doesn’t include this glyph, it may render as a fallback character.