U+03C4 "τ" Greek Small Letter Tau Unicode Character

U+03C4 "τ" Greek Small Letter Tau is the 19th letter of the Greek alphabet and has been used historically as a symbol in various academic and scientific fields. In mathematics and physics, it commonly represents the tau constant (equal to 2π), torque, shear stress, and the elementary particle known as the tau lepton. The letter’s character is visually similar to the Latin lowercase "t" but distinguished by its uncial form and origin from the Phoenician letter taw. Within the Unicode standard, it belongs to the Greek and Coptic block and is encoded in the range designed for classical and modern Greek script.

General Properties

Code Point	U+03C4
Version Added	1.1
Name	Greek Small Letter Tau
Block	Greek and Coptic
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	τ
HTML Hex Encoding	τ
UTF-8 Encoding	0xCF 0x84
UTF-16 Encoding	0x03C4
UTF-32 Encoding	0x000003C4
C/C++/Java Escape	\u03c4

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
Lowercase	Yes
Simple Uppercase Code Point	"Τ" U+03A4 Greek Capital Letter Tau
Simple Titlecase Code Point	"Τ" U+03A4 Greek Capital Letter Tau
Uppercase Code Point	"Τ" U+03A4 Greek Capital Letter Tau
Titlecase Code Point	"Τ" U+03A4 Greek Capital Letter Tau
Cased	Yes
Changes When Casemapped	Yes
Changes When Titlecased	Yes
Changes When Uppercased	Yes
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	Lower