Unicode Tau

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U+03C4 was added to Unicode in version 1.1 (1993). It belongs to the blockGreek and Coptic in the Basic Multilingual Plane. This character is a Lowercase Letter and is mainly used in the Greek script. It is related to its uppercase variantand its titlecase variant . The glyph is not a composition. It has a Ambiguous East Asian Width.

In bidirectional context it acts as Left To Right and is not mirrored. The glyph can, under circumstances, be confused with 36 other glyphs. In text U+03C4 behaves as Alphabetic regarding line breaks. It has type Lower for sentence and ALetter for word breaks. The Grapheme Cluster Break is Any. The Wikipedia has the following information about this codepoint:. Tau (uppercase Τ, lowercase τ; Greek: ταυ [taf]) is the 19th letter of the Greek alphabet. In the system of Greek numerals it has a value of 300. The name in English is pronounced /taʊ/ or /tɔː/, but in modern Greek it is [taf]. This is because the pronunciation of the combination of Greek letters αυ has changed from ancient to modern times from one of [au] to either [av] or [af], depending on what follows (see Greek orthography).

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Tau Symbol NameSymbolDecimalHex EntityHtml Entity
Greek Capital Letter TauΤ&‌#932;&‌#x03A4&‌Tau;
Greek Small Letter Tauτ&‌#964;&‌#x03C4&‌tau;
Tau was derived from the Phoenician letter taw . Letters that arose from tau include Roman T and Cyrillic Te (Т, т).
The letter occupies the Unicode slots U+03C4 (lowercase) and U+03A4 (uppercase).
How to type ΤGreek Capital Letter Tau symbol from keyboard?

In HTML, they can be produced with named entities (τ and Τ), decimal references (τ and Τ), or hexadecimal references (τ and Τ).

The Greek small letter τ (tau) is used in math as the circle constant to represent a full rotation around a circle in radians.


The value of is approximately and can be calculated by dividing any circle’s circumference by its radius.