DocumentationMathematicaThe Mathematica BookMathematica Reference GuideListing of Named Characters
Pi
\[Pi]
Aliases: p, pi. Greek letter with built-in value. Interpreted by default as the symbol Pi. See Section 1.10.1 and Section 3.10.3. See also: \[DoubledPi] , \[CapitalPi] , \[CurlyPi] .