U+03A8 "Ψ" Greek Capital Letter Psi Unicode Character

U+03A8 "Ψ" Greek Capital Letter Psi is the twenty-third letter of the Greek alphabet, representing the “ps” sound and serving as the direct ancestor of the Latin character “X” through early Western Greek alphabets. In modern contexts, it is widely used as a mathematical and scientific symbol, most famously denoting the wave function in quantum mechanics, as well as representing psychology, parapsychology, and the concept of the psyche in various academic and cultural fields. Its distinctive trident-like shape also makes it a popular icon in typography and popular culture.

General Properties

Code Point	U+03A8
Version Added	1.1
Name	Greek Capital Letter Psi
Block	Greek and Coptic
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	Ψ
HTML Hex Encoding	Ψ
UTF-8 Encoding	0xCE 0xA8
UTF-16 Encoding	0x03A8
UTF-32 Encoding	0x000003A8
C/C++/Java Escape	\u03a8

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	"ψ" U+03C8 Greek Small Letter Psi
Lowercase Code Point	"ψ" U+03C8 Greek Small Letter Psi
Simple Case Folding	"ψ" U+03C8 Greek Small Letter Psi
Case Folding	"ψ" U+03C8 Greek Small Letter Psi
Cased	Yes
Changes When Casefolded	Yes
Changes When Casemapped	Yes
Changes When Lowercased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"ψ" U+03C8 Greek Small Letter Psi
NFKC Simple Casefold	"ψ" U+03C8 Greek Small Letter Psi
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