U+03DE "Ϟ" Greek Letter Koppa Unicode Character

U+03DE "Ϟ" Greek Letter Koppa is a numeric symbol from the ancient Greek alphabet, originally used as a letter representing the sound /k/ before back vowels, but it later fell out of use as a standard alphabetic character and was retained primarily as a numeral for the number 90 in the ancient Greek numeral system. In modern contexts, this character is sometimes used in scholarly or typographic works to denote the ancient letter or its numeric value, and it can appear in historical or linguistic texts, but it is not part of the standard modern Greek alphabet.

General Properties

Code Point	U+03DE
Version Added	1.1
Name	Greek Letter Koppa
Unicode 1.0 Name	Greek Capital Letter Koppa
Block	Greek and Coptic
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	Ϟ
HTML Hex Encoding	Ϟ
UTF-8 Encoding	0xCF 0x9E
UTF-16 Encoding	0x03DE
UTF-32 Encoding	0x000003DE
C/C++/Java Escape	\u03de

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
Uppercase	Yes
Simple Lowercase Code Point	"ϟ" U+03DF Greek Small Letter Koppa
Lowercase Code Point	"ϟ" U+03DF Greek Small Letter Koppa
Simple Case Folding	"ϟ" U+03DF Greek Small Letter Koppa
Case Folding	"ϟ" U+03DF Greek Small Letter Koppa
Cased	Yes
Changes When Casefolded	Yes
Changes When Casemapped	Yes
Changes When Lowercased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"ϟ" U+03DF Greek Small Letter Koppa
NFKC Simple Casefold	"ϟ" U+03DF Greek Small Letter Koppa
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