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Greek alphabet | |||||
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Αα Alpha | Νν Nu | ||||
Ββ Beta | Ξξ Xi | ||||
Γγ Gamma | Οο Omicron | ||||
Δδ Delta | Ππ Pi | ||||
Εε Epsilon | Ρρ Rho | ||||
Ζζ Zeta | Σσς Sigma | ||||
Ηη Eta | Ττ Tau | ||||
Θθ Theta | Υυ Upsilon | ||||
Ιι Iota | Φφ Phi | ||||
Κκ Kappa | Χχ Chi | ||||
Λλ Lambda | Ψψ Psi | ||||
Μμ Mu | Ωω Omega | ||||
Obsolete letters | |||||
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Other characters | |||||
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Greek diacritics |
Pi (uppercase Π, lower case π) is the sixteenth letter of the Greek alphabet. In the system of Greek numerals it has a value of 80. Letters that arose from pi include Cyrillic Pe (П, п).
In Modern Greek, the name of the letter is pronounced /pi/; in modern English, it is pronounced /paɪ/, in particular when referring to the mathematical constant (see below). In Greek the letter is pronounced /p/.
The upper-case letter Π is used as a symbol for:
The lower-case letter π is used as a symbol for:
Variant pi or "pomega" ( or ϖ) is a glyph variant of lower case pi sometimes used in technical contexts as though it were a lower-case omega with a macron, though historically it is simply a cursive form of pi, with its legs bent inward to meet. It is used as a symbol for:
In HTML, the capital letter Π can be produced using the codes Π or Π, and the lower-case by using π or π within the source code.