U+03A3 "Σ" Greek Capital Letter Sigma Unicode Character

U+03A3 "Σ" Greek Capital Letter Sigma is a member of the Greek and Coptic block, representing the eighteenth letter of the Greek alphabet and typically corresponding to the "s" sound in English. In modern Greek, it is the uppercase form used at the beginning or within a word, while in mathematics and science, it is widely recognized as the summation symbol, denoting the total of a series of numbers. Historically derived from the Phoenician letter "shin," Sigma has been a cornerstone of Greek writing since antiquity, appearing in classical texts, inscriptions, and modern academic notation.

General Properties

Code Point	U+03A3
Version Added	1.1
Name	Greek Capital Letter Sigma
Block	Greek and Coptic
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	Σ
HTML Hex Encoding	Σ
UTF-8 Encoding	0xCE 0xA3
UTF-16 Encoding	0x03A3
UTF-32 Encoding	0x000003A3
C/C++/Java Escape	\u03a3

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	"σ" U+03C3 Greek Small Letter Sigma
Lowercase Code Point	"σ" U+03C3 Greek Small Letter Sigma
Simple Case Folding	"σ" U+03C3 Greek Small Letter Sigma
Case Folding	"σ" U+03C3 Greek Small Letter Sigma
Cased	Yes
Changes When Casefolded	Yes
Changes When Casemapped	Yes
Changes When Lowercased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"σ" U+03C3 Greek Small Letter Sigma
NFKC Simple Casefold	"σ" U+03C3 Greek Small Letter Sigma
Script	Greek
Script Extensions	Greek
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