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