U+0421 "С" Cyrillic Capital Letter Es Unicode Character

U+0421 "С" Cyrillic Capital Letter Es is the uppercase form of the Cyrillic letter that represents the voiceless alveolar fricative sound /s/, similar to the English "s" in "sun". It is the nineteenth letter in the modern Russian alphabet and is used in many other Cyrillic-based writing systems, including Ukrainian and Bulgarian. Visually, this character is a homoglyph of the Latin capital letter C, which can lead to confusion in digital contexts, though it is a distinct character with its own unique code point and historical derivation from the Greek letter sigma.

General Properties

Code Point	U+0421
Version Added	1.1
Name	Cyrillic Capital Letter Es
Block	Cyrillic
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	С
HTML Hex Encoding	С
UTF-8 Encoding	0xD0 0xA1
UTF-16 Encoding	0x0421
UTF-32 Encoding	0x00000421
C/C++/Java Escape	\u0421

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
East Asian Width	Ambiguous
Uppercase	Yes
Simple Lowercase Code Point	"с" U+0441 Cyrillic Small Letter Es
Lowercase Code Point	"с" U+0441 Cyrillic Small Letter Es
Simple Case Folding	"с" U+0441 Cyrillic Small Letter Es
Case Folding	"с" U+0441 Cyrillic Small Letter Es
Cased	Yes
Changes When Casefolded	Yes
Changes When Casemapped	Yes
Changes When Lowercased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"с" U+0441 Cyrillic Small Letter Es
NFKC Simple Casefold	"с" U+0441 Cyrillic Small Letter Es
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	Upper