ℑ is the Unicode character BLACK-LETTER CAPITAL I, code point U+2111 (decimal 8465) in the Letterlike Symbols block, added in Unicode 1.1. In HTML write ℑ, and in UTF-8 it is the 3 bytes E2 84 91.
Codes
| Where | How to write it |
|---|---|
| Code point | U+2111 |
| Decimal | 8465 |
| UTF-8 bytes | E2 84 91 |
| UTF-16 (big-endian) | 2111 |
| UTF-32 | 00002111 |
| HTML decimal | ℑ |
| HTML hex | ℑ |
| HTML named | ℑ ℑ ℑ ℑ |
| CSS | \2111 |
| JavaScript | \u2111 |
| JSON | \u2111 |
| Python | \u2111 |
| Python by name | \N{BLACK-LETTER CAPITAL I} |
| Java, C# | \u2111 |
| Rust, Swift | \u{2111} |
| Go, C, C++ | \u2111 |
| URL (percent-encoded) | %E2%84%91 |
JavaScript and JSON strings store text as UTF-16, so this character is one code unit long. Python 3 strings count code points, so its length there is 1.
Properties
| Property | Value |
|---|---|
| Name | BLACK-LETTER CAPITAL I |
| Code point | U+2111 (decimal 8465) |
| Block | Letterlike Symbols (U+2100–U+214F) |
| General category | Lu: Uppercase letter |
| Script | Common |
| Bidirectional class | L: Left-to-right |
| Mirrored in right-to-left text | No |
| First in Unicode version | 1.1 |
Decomposition
BLACK-LETTER CAPITAL I has a compatibility decomposition (font) to the sequence below. NFKC and NFKD normalisation replace it with that sequence, which can change how text looks, so use them for search, not for storage.
Nearby in Letterlike Symbols
- ℉ U+2109 Degree Fahrenheit
- ℊ U+210A Script Small G
- ℋ U+210B Script Capital H
- ℌ U+210C Black-Letter Capital H
- ℍ U+210D Double-Struck Capital H
- ℎ U+210E Planck Constant
- ℏ U+210F Planck Constant Over Two Pi
- ℐ U+2110 Script Capital I
- ℒ U+2112 Script Capital L
- ℓ U+2113 Script Small L
- ℔ U+2114 L B Bar Symbol
- ℕ U+2115 Double-Struck Capital N
- № U+2116 Numero Sign
- ℗ U+2117 Sound Recording Copyright
- ℘ U+2118 Script Capital P
- ℙ U+2119 Double-Struck Capital P
All 80 characters: Letterlike Symbols.
Official reference
Questions people ask
- What is the HTML code for ℑ?
- Use the named entity ℑ, or ℑ (decimal) or ℑ (hex).
- What is the UTF-8 encoding of U+2111?
- E2 84 91 (hex), 3 bytes. In a URL it is %E2%84%91.
- How do I write U+2111 in JavaScript or Python?
- JavaScript: \u2111. Python: \u2111.
Source
Unicode Character Database 18.0.0 (Unicode License v3); HTML entity names from the WHATWG HTML Standard (CC BY 4.0). The encodings above are computed from the code point and checked against Python's encoders. How the character looks depends on your fonts.
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