# 𝕀 U+1D540 MATHEMATICAL DOUBLE-STRUCK CAPITAL I

Capital I in blackboard bold with doubled strokes, used in math for indicator functions or identity and for stylized text.

| | |
|---|---|
| Character | `𝕀` |
| Codepoint | U+1D540 |
| Name | MATHEMATICAL DOUBLE-STRUCK CAPITAL I |
| Block | [Mathematical Alphanumeric Symbols](https://unicodekit.com/block/mathematical-alphanumeric-symbols) |
| Script | Common |
| Category | Uppercase Letter (Lu) |
| Unicode version | 3.1 |
| HTML | `𝕀` `𝕀` |
| CSS | `\1D540` |
| JavaScript | `\u{1D540}` |
| UTF-8 | F0 9D 95 80 |
| UTF-16 | D835 DD40 |
| Decomposition | font U+0049 |

## Related characters

- 𝕁 [U+1D541 MATHEMATICAL DOUBLE-STRUCK CAPITAL J](https://unicodekit.com/char/1D541)
- 𝔾 [U+1D53E MATHEMATICAL DOUBLE-STRUCK CAPITAL G](https://unicodekit.com/char/1D53E)
- 𝕂 [U+1D542 MATHEMATICAL DOUBLE-STRUCK CAPITAL K](https://unicodekit.com/char/1D542)
- 𝔽 [U+1D53D MATHEMATICAL DOUBLE-STRUCK CAPITAL F](https://unicodekit.com/char/1D53D)
- 𝕃 [U+1D543 MATHEMATICAL DOUBLE-STRUCK CAPITAL L](https://unicodekit.com/char/1D543)
- 𝔼 [U+1D53C MATHEMATICAL DOUBLE-STRUCK CAPITAL E](https://unicodekit.com/char/1D53C)
- 𝕄 [U+1D544 MATHEMATICAL DOUBLE-STRUCK CAPITAL M](https://unicodekit.com/char/1D544)
- 𝔻 [U+1D53B MATHEMATICAL DOUBLE-STRUCK CAPITAL D](https://unicodekit.com/char/1D53B)
- 𝕆 [U+1D546 MATHEMATICAL DOUBLE-STRUCK CAPITAL O](https://unicodekit.com/char/1D546)
- 𝔹 [U+1D539 MATHEMATICAL DOUBLE-STRUCK CAPITAL B](https://unicodekit.com/char/1D539)
- 𝔸 [U+1D538 MATHEMATICAL DOUBLE-STRUCK CAPITAL A](https://unicodekit.com/char/1D538)
- 𝔷 [U+1D537 MATHEMATICAL FRAKTUR SMALL Z](https://unicodekit.com/char/1D537)

Page: https://unicodekit.com/char/1D540 · JSON: https://unicodekit.com/characters/1D540