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Lower-case pi was fairly common in 8-bit character encodings, for instance it is at 0xE3 in CP437 and at 0xB9 on Mac OS Roman. The various forms of pi present in Unicode are: U+03A0 Π GREEK CAPITAL LETTER PI (Π) U+03C0 π GREEK SMALL LETTER PI (π) U+03D6 ϖ GREEK PI SYMBOL (ϖ, ϖ) U+1D28 ᴨ GREEK LETTER SMALL CAPITAL PI
The number π (/ p aɪ / ⓘ; spelled out as "pi") is a mathematical constant, approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter.It appears in many formulae across mathematics and physics, and some of these formulae are commonly used for defining π, to avoid relying on the definition of the length of a curve.
As of Unicode version 16.0, there are 155,063 characters with code points, covering 168 modern and historical scripts, as well as multiple symbol sets.This article includes the 1,062 characters in the Multilingual European Character Set 2 subset, and some additional related characters.
Historically, upper-case letters were used for representing points in geometry, and lower-case letters were used for variables and constants. Letters are used for representing many other types of mathematical object. As the number of these types has increased, the Greek alphabet and some Hebrew letters have also come to be used.
This page lists codes for keyboard characters, the computer code values for common characters, such as the Unicode or HTML entity codes (see below: Table of HTML values"). There are also key chord combinations, such as keying an en dash ('–') by holding ALT+0150 on the numeric keypad of MS Windows computers.
is pi, the ratio of the circumference of a circle to its diameter. Euler's identity is named after the Swiss mathematician Leonhard Euler . It is a special case of Euler's formula e i x = cos x + i sin x {\displaystyle e^{ix}=\cos x+i\sin x} when evaluated for x = π {\displaystyle x=\pi } .
symbol name code point large circle: u+25ef 〇: ideographic number zero: u+3007 O: fullwidth latin capital letter o: u+ff2f ⃝: combining enclosing circle: u+20dd ⭕: heavy large circle: u+2b55 ⚫: medium black circle: u+26ab 🔴: large red circle: u+1f534 o: latin capital letter o: u+004f 🔵: large blue circle: u+1f535 ⊕: circled plus ...
Symbol Name Symbol Name Symbol Name Last Hex# HTML Hex HTML Hex HTML Hex Dec Picture Dec Picture Dec Picture CIRCLE WITH LEFT HALF BLACK UPPER HALF CIRCLE WHITE SQUARE WITH UPPER LEFT QUADRANT 0 ◐ ◠ ◰ ◐ ◠ ◰ CIRCLE WITH RIGHT HALF BLACK LOWER HALF CIRCLE WHITE SQUARE WITH LOWER LEFT QUADRANT 1 ◑ &# ...