Result = Pi ( [ Number ] )
Returns π * Number. If Number is not specified, it is assumed to be one.
PRINT Pi 3.14159265359
PRINT Pi(0.5) 1.570796326795
Asn / ASin, Acs / ACos, Acsh / ACosh, Asnh / ASinh, Cos, Cosh, Deg, Rad, Sin, Sinh