U+03A4 "Τ" Greek Capital Letter Tau Unicode Character

U+03A4 "Τ" Greek Capital Letter Tau is the uppercase form of the twentieth letter in the Greek alphabet, where it represents the voiceless dental or alveolar plosive sound /t/. In the ancient Greek numeral system, it held the numerical value of 300. Visually identical to the Latin capital letter T, Tau holds cultural and religious significance as a symbol of the cross in early Christian traditions, often associated with Saint Anthony. In modern contexts, it is widely used in mathematics and science to denote torque, tau function, and sometimes the golden ratio, while also appearing in the names of stars such as Tau Ceti.

General Properties

Code Point	U+03A4
Version Added	1.1
Name	Greek Capital Letter Tau
Block	Greek and Coptic
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	Τ
HTML Hex Encoding	Τ
UTF-8 Encoding	0xCE 0xA4
UTF-16 Encoding	0x03A4
UTF-32 Encoding	0x000003A4
C/C++/Java Escape	\u03a4

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	"τ" U+03C4 Greek Small Letter Tau
Lowercase Code Point	"τ" U+03C4 Greek Small Letter Tau
Simple Case Folding	"τ" U+03C4 Greek Small Letter Tau
Case Folding	"τ" U+03C4 Greek Small Letter Tau
Cased	Yes
Changes When Casefolded	Yes
Changes When Casemapped	Yes
Changes When Lowercased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"τ" U+03C4 Greek Small Letter Tau
NFKC Simple Casefold	"τ" U+03C4 Greek Small Letter Tau
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