U+0401 CYRILLIC CAPITAL LETTER IO
U+0401 was added to Unicode in version 1.1 (1993). It belongs to the block 
This character is a Uppercase Letter and is mainly used in the Cyrillic script. It is related to its lowercase variant 
.
The glyph is a Canonical composition of the glyphs 
. It has a Ambiguous East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. In text U+0401 behaves as Alphabetic regarding line breaks. It has
type Upper for sentence and ALetter for word breaks. The Grapheme Cluster Break is Any.
The Wikipedia has the following information about this codepoint:
Yo (Ё ё; italics: Ё ё; Russian pronunciation: [jo]) is a letter of the Cyrillic script. In Unicode, the letter ⟨Ё⟩ is named CYRILLIC CAPITAL/SMALL LETTER IO.
In English, the letter Yo is romanized using the Latin ë (according to the ALA–LC and British Standards), ë (yë word-initially) (BGN/PCGN) or yo (orthographic transcription) for Russian, and as i͡o (ALA–LC), yo (BGN/PCGN), or ë (BSI) for Belarusian. In international systems, Yo is romanized as ë (ISO 9).
It was derived from the Greek letter Epsilon (Ε ε).
Representations
| System | Representation |
|---|---|
| Nº | 1025 |
| UTF-8 | D0 81 |
| UTF-16 | 04 01 |
| UTF-32 | 00 00 04 01 |
| URL-Quoted | %D0%81 |
| HTML-Escape | Ё |
| Wrong windows-1252 Mojibake | Ð |
| HTML-Escape | Ё |
| digraph | IO |
| LaTeX | \cyrchar\CYRYO |
| Encoding: EUC-KR (hex bytes) | AC A7 |
| Encoding: IBM866 (hex bytes) | F0 |
| Encoding: ISO-8859-5 (hex bytes) | A1 |
| Encoding: JIS0208 (hex bytes) | A7 A7 |
| Encoding: KOI8-R (hex bytes) | B3 |
| Encoding: KOI8-U (hex bytes) | B3 |
| Encoding: WINDOWS-1251 (hex bytes) | A8 |
| Encoding: X-MAC-CYRILLIC (hex bytes) | DD |
Related Characters
Elsewhere
Complete Record
| Property | Value |
|---|---|
| Age (age) | 1.1 |
| Unicode Name (na) | CYRILLIC CAPITAL LETTER IO |
| Unicode 1 Name (na1) | — |
| Block (blk) | Cyrillic |
| General Category (gc) | Uppercase Letter |
| Script (sc) | Cyrillic |
| Bidirectional Category (bc) | Left To Right |
| Combining Class (ccc) | Not Reordered |
| Decomposition Type (dt) | Canonical |
| Decomposition Mapping (dm) |
|
| Lowercase (Lower) | ✘ |
| Simple Lowercase Mapping (slc) |
|
| Lowercase Mapping (lc) |
|
| Uppercase (Upper) | ✔ |
| Simple Uppercase Mapping (suc) |
 |
| Uppercase Mapping (uc) |
|
| Simple Titlecase Mapping (stc) |
|
| Titlecase Mapping (tc) |
|
| Case Folding (cf) |
|
| ASCII Hex Digit (AHex) | ✘ |
| Alphabetic (Alpha) | ✔ |
| Bidi Control (Bidi_C) | ✘ |
| Bidi Mirrored (Bidi_M) | ✘ |
| Bidi Paired Bracket (bpb) |
|
| Bidi Paired Bracket Type (bpt) | None |
| Cased (Cased) | ✔ |
| Composition Exclusion (CE) | ✘ |
| Case Ignorable (CI) | ✘ |
| Full Composition Exclusion (Comp_Ex) | ✘ |
| Changes When Casefolded (CWCF) | ✔ |
| Changes When Casemapped (CWCM) | ✔ |
| Changes When NFKC Casefolded (CWKCF) | ✔ |
| Changes When Lowercased (CWL) | ✔ |
| Changes When Titlecased (CWT) | ✘ |
| Changes When Uppercased (CWU) | ✘ |
| Dash (Dash) | ✘ |
| Deprecated (Dep) | ✘ |
| Default Ignorable Code Point (DI) | ✘ |
| Diacritic (Dia) | ✘ |
| East Asian Width (ea) | Ambiguous |
| Extender (Ext) | ✘ |
| FC NFKC Closure (FC_NFKC) |
|
| Grapheme Cluster Break (GCB) | Any |
| Grapheme Base (Gr_Base) | ✔ |
| Grapheme Extend (Gr_Ext) | ✘ |
| Grapheme Link (Gr_Link) | ✘ |
| Hex Digit (Hex) | ✘ |
| Hangul Syllable Type (hst) | Not Applicable |
| Hyphen (Hyphen) | ✘ |
| ID Continue (IDC) | ✔ |
| Ideographic (Ideo) | ✘ |
| ID Start (IDS) | ✔ |
| IDS Binary Operator (IDSB) | ✘ |
| IDS Trinary Operator and (IDST) | ✘ |
| InMC (InMC) | — |
| Indic Positional Category (InPC) | NA |
| Indic Syllabic Category (InSC) | Other |
| ISO 10646 Comment (isc) | — |
| Joining Group (jg) | No_Joining_Group |
| Join Control (Join_C) | ✘ |
| Jamo Short Name (JSN) | — |
| Joining Type (jt) | Non Joining |
| Line Break (lb) | Alphabetic |
| Logical Order Exception (LOE) | ✘ |
| Math (Math) | ✘ |
| Noncharacter Code Point (NChar) | ✘ |
| NFC Quick Check (NFC_QC) | Yes |
| NFD Quick Check (NFD_QC) | No |
| NFKC Casefold (NFKC_CF) |
|
| NFKC Quick Check (NFKC_QC) | Yes |
| NFKD Quick Check (NFKD_QC) | No |
| Numeric Type (nt) | None |
| Numeric Value (nv) | NaN |
| Other Alphabetic (OAlpha) | ✘ |
| Other Default Ignorable Code Point (ODI) | ✘ |
| Other Grapheme Extend (OGr_Ext) | ✘ |
| Other ID Continue (OIDC) | ✘ |
| Other ID Start (OIDS) | ✘ |
| Other Lowercase (OLower) | ✘ |
| Other Math (OMath) | ✘ |
| Other Uppercase (OUpper) | ✘ |
| Pattern Syntax (Pat_Syn) | ✘ |
| Pattern White Space (Pat_WS) | ✘ |
| Quotation Mark (QMark) | ✘ |
| Radical (Radical) | ✘ |
| Sentence Break (SB) | Upper |
| Simple Case Folding (scf) |
|
| Script Extension (scx) | Cyrillic |
| Soft Dotted (SD) | ✘ |
| STerm (STerm) | ✘ |
| Terminal Punctuation (Term) | ✘ |
| Unified Ideograph (UIdeo) | ✘ |
| Variation Selector (VS) | ✘ |
| Word Break (WB) | ALetter |
| White Space (WSpace) | ✘ |
| XID Continue (XIDC) | ✔ |
| XID Start (XIDS) | ✔ |
| Expands On NFC (XO_NFC) | ✘ |
| Expands On NFD (XO_NFD) | ✔ |
| Expands On NFKC (XO_NFKC) | ✘ |
| Expands On NFKD (XO_NFKD) | ✔ |