ё is the Unicode character CYRILLIC SMALL LETTER IO, code point U+0451 (decimal 1105) in the Cyrillic block, added in Unicode 1.1. In HTML write ё, and in UTF-8 it is the 2 bytes D1 91.
Codes
| Where | How to write it |
|---|---|
| Code point | U+0451 |
| Decimal | 1105 |
| UTF-8 bytes | D1 91 |
| UTF-16 (big-endian) | 0451 |
| UTF-32 | 00000451 |
| HTML decimal | ё |
| HTML hex | ё |
| HTML named | ё |
| CSS | \451 |
| JavaScript | \u0451 |
| JSON | \u0451 |
| Python | \u0451 |
| Python by name | \N{CYRILLIC SMALL LETTER IO} |
| Java, C# | \u0451 |
| Rust, Swift | \u{451} |
| Go, C, C++ | \u0451 |
| URL (percent-encoded) | %D1%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 | CYRILLIC SMALL LETTER IO |
| Code point | U+0451 (decimal 1105) |
| Block | Cyrillic (U+0400–U+04FF) |
| General category | Ll: Lowercase letter |
| Script | Cyrillic |
| Bidirectional class | L: Left-to-right |
| Mirrored in right-to-left text | No |
| First in Unicode version | 1.1 |
Decomposition
CYRILLIC SMALL LETTER IO is canonically equivalent to the sequence below. Normalising text to NFD splits it into these parts; NFC joins them back into U+0451. Search and comparison should normalise first, or the two spellings will not match.
Upper and lower case
- Ё U+0401 Cyrillic Capital Letter Io — Uppercase
Nearby in Cyrillic
- щ U+0449 Cyrillic Small Letter Shcha
- ъ U+044A Cyrillic Small Letter Hard Sign
- ы U+044B Cyrillic Small Letter Yeru
- ь U+044C Cyrillic Small Letter Soft Sign
- э U+044D Cyrillic Small Letter E
- ю U+044E Cyrillic Small Letter Yu
- я U+044F Cyrillic Small Letter Ya
- ѐ U+0450 Cyrillic Small Letter Ie With Grave
- ђ U+0452 Cyrillic Small Letter Dje
- ѓ U+0453 Cyrillic Small Letter Gje
- є U+0454 Cyrillic Small Letter Ukrainian Ie
- ѕ U+0455 Cyrillic Small Letter Dze
- і U+0456 Cyrillic Small Letter Byelorussian-Ukrainian I
- ї U+0457 Cyrillic Small Letter Yi
- ј U+0458 Cyrillic Small Letter Je
- љ U+0459 Cyrillic Small Letter Lje
All 256 characters: Cyrillic.
Official reference
Questions people ask
- What is the HTML code for ё?
- Use the named entity ё, or ё (decimal) or ё (hex).
- What is the UTF-8 encoding of U+0451?
- D1 91 (hex), 2 bytes. In a URL it is %D1%91.
- How do I write U+0451 in JavaScript or Python?
- JavaScript: \u0451. Python: \u0451.
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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