Is there a defined value in the standard namespaces for the golden ratio?

Question

I was trying to find if there is a value for the golden ratio already defined in one of the standard namespaces but I was not able to find anything in the docs or other online resources.

So is there a value for the golden ratio already defined somewhere in the standard namespaces that I might have missed?

Under Math there is Math.Pi and Math.E but no Math.Phi?

Answer 1

No there is not. However, the golden ratio is the solution to a number whose reciprocal is itself minus 1:

You can then solve that with the quadratic formula to get:

This means you can define the golden ratio as one of the following:

readonly double GoldenRatio = (1 + Math.Sqrt(5)) / 2; const double GoldenRatio = 1.61803398874989484820458683436;