Cyrillic Capital Letter Byelorussian-Ukrainian I HTML entity І

І: HTML entity for Cyrillic Capital Letter Byelorussian-Ukrainian I І (U+0406), with decimal, hex, CSS, JavaScript, Python and URL codes to copy.

Entity
І
Code point
U+0406
Unicode name
CYRILLIC CAPITAL LETTER BYELORUSSIAN-UKRAINIAN I
Block
Cyrillic
Category
Uppercase letter (Lu)
Since
Unicode 1.1
Defined in
HTML5

Codes to copy

HTML namedІWorks in HTML; in XML only & < > " ' are predefined.
HTML decimalІWorks in HTML and XML.
HTML hexІWorks in HTML and XML.
CSScontent: "\406";In a stylesheet, for ::before and ::after.
JavaScript"\u0406"Also valid in JSON.
Python"\u0406"Python 3 string literal.
Python by name"\N{CYRILLIC CAPITAL LETTER BYELORUSSIAN-UKRAINIAN I}"Readable alternative using the Unicode name.
URL%D0%86Percent-encoded UTF-8 bytes, for a path or query value.
UTF-8 bytesD0 862 bytes.
UTF-1604061 code unit, which is what JavaScript length counts.

When to use it

І writes U+0406 (Cyrillic Capital Letter Byelorussian-Ukrainian I), a capital letter from the Unicode Cyrillic block, encoded since Unicode 1.1. For Cyrillic text, type the letters directly on a UTF-8 page; named references for every letter make long text unreadable in source.

The name comes from the HTML5 list (much of it shared with MathML), so it works in every current browser but not in XML or XHTML served as XML, where the numeric reference is the safe choice.

More cyrillic letters

All cyrillic letters · Every HTML entity · Encode or decode text

Source: the WHATWG HTML Standard list of named character references and the Unicode Character Database (Unicode 18.0).