Technical information

Symbol
NameDouble-struck capital r
Unicode numberU+211D
CategoryDouble-struck symbols
DescriptionThe Unicode character ℝ, or U+211D, is known as the "Double-Struck Capital R". It belongs to the "Letterlike Symbols" block and falls under the "Letter, Uppercase" category in the Unicode standard. In mathematics, the double-struck capital R is often used to represent the set of all real numbers. The character looks like a capital "R", but is typically more stylized or bold to distinguish it from the regular capital "R". Its exact rendering can depend on the typeface and platform.

Encoding

HTML Entityℝ
HTML Entity (hex)ℝ
HTML Entity (named)
URL Escape Code%E2%84%9D
UTF-8 (hex)0xE2 0x84 0x9D
UTF-8 (binary)11100010:10000100:10011101
UTF-160x211D
UTF-320x0000211D

Source Code

C, C++, and Java"\u211D"
CSS Code\211D
JavaScript"\u211D"
Perl\x{211D}
Python 2u"\u211D"
Python 3\u211D
Ruby\u{211D}

Preview

This Unicode character looks like this ℝ in sentence and in bold like this and in italic like this .

Font size:

12px
16px
20px
28px
36px
48px
72px

CSS Property: font-weight

100
200
300
400
500
600
700
800
900

HTML Forms and Input

input
disabled input
input-group
select
button
button

Code examples in HTML and CSS

<span>&#8477;</span>

            
span {
    content: "\211D";
}

The symbol in different fonts

-apple-system
Apple Color Emoji
Arial
BlinkMacSystemFont
Courier New
Georgia
Droid Sans
Helvetica
Noto Sans
Oxygen
Roboto
"Segoe UI"
sans-serif
Segoe UI Emoji
Segoe UI Symbol
system-ui
Times New Roman
Ubuntu
Verdana

References