function Pi : Extended;
Description
The Pi function returns a floating point value giving a useful approximation of the value of Pi.
The circumference of a circle Pi * Diameter.
Related commands
Cos The Cosine of a number
Extended The floating point type with the highest capacity and precision
Sin The Sine of a number
Tan The Tangent of a number
Example code : Get the area and circumference of a circle
var
myPi : Extended;
diam : Integer;
begin
diam := 10;
// Show circumference and the area of a circle
// with diameter - 10 cm
ShowMessage(' Diameter = '+IntToStr(diam));
ShowMessage('Circumference = '+FloatToStr(Pi*diam));
ShowMessage(' Area = '+FloatToStr(Pi*(diam/2)*(diam/2)));
end;
Show full unit code
Diameter = 10
Circumference = 31.4159265358979
Area = 78.5398163397448