U+0457 "ї" Cyrillic Small Letter Yi Unicode Character

U+0457 "ї" Cyrillic Small Letter Yi is a distinct glyph used primarily in the Ukrainian and Rusyn alphabets to represent the sound /ji/ or the vowel /i/ after a consonant, and it consists of the Cyrillic letter "і" with a diaeresis (two dots) placed above it. This character is considered a separate letter, not merely a diacritic variant, and it appears in the Cyrillic block of Unicode as the lowercase counterpart to U+0407 "Ї" Cyrillic Capital Letter Yi. It plays a crucial role in Ukrainian orthography, where it distinguishes meaning between words like "їсти" (to eat) and "істи" (to exist), and it is commonly found in words such as "Україна" (Ukraine) and "сміється" (laughs).

General Properties

Code Point	U+0457
Version Added	1.1
Name	Cyrillic Small Letter Yi
Block	Cyrillic
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Canonical
Decomposition Mapping	"і" U+0456 Cyrillic Small Letter Byelorussian-Ukrainian I "̈" U+0308 Combining Diaeresis

Encodings

HTML Decimal Encoding	ї
HTML Hex Encoding	ї
UTF-8 Encoding	0xD1 0x97
UTF-16 Encoding	0x0457
UTF-32 Encoding	0x00000457
C/C++/Java Escape	\u0457

Unicode Properties

NFC Quick Check	Yes
NFKC Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	Yes
Simple Uppercase Code Point	"Ї" U+0407 Cyrillic Capital Letter Yi
Simple Titlecase Code Point	"Ї" U+0407 Cyrillic Capital Letter Yi
Uppercase Code Point	"Ї" U+0407 Cyrillic Capital Letter Yi
Titlecase Code Point	"Ї" U+0407 Cyrillic Capital Letter Yi
Cased	Yes
Changes When Casemapped	Yes
Changes When Titlecased	Yes
Changes When Uppercased	Yes
Script	Cyrillic
Script Extensions	Cyrillic
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Lower