Code point
U+211D
Glyph appearance depends on your fonts.
U+211D
Lu<font> 0052U+211D DOUBLE-STRUCK CAPITAL R is a Unicode 16.0.0 character in the Uppercase Letter category. It belongs to the Letterlike Symbols block.
Choose the representation you need, then copy its value.
U+211D
8477
ℝ
ℝ
ℝ
E2 84 9D
211D
0000211D
%E2%84%9D
\u211D
\u211D
\u211D
\211D