Returns a double
(64-bit floating point number) value that represents pi (ratio between the circumference and diameter of a circle...). Typical usage
y = pi
This value is approximately 3.141592653589793.
The following example demonstrates the use of the pi
function.
--> pi ans = <double> - size: [1 1] 3.141592653589793 --> cos(pi) ans = <double> - size: [1 1] -1.000000000000000