Golden ratio/Convergence: Difference between revisions
Add C# implementation
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Result: 1.618033 after 14 iterations
The error is approximately -0.000001
</pre>
=={{header|C#}}==
{{trans|Java}}
<syntaxhighlight lang="C#">
using System;
public class GoldenRatio {
static void Iterate() {
double oldPhi = 1.0, phi = 1.0, limit = 1e-5;
int iters = 0;
while (true) {
phi = 1.0 + 1.0 / oldPhi;
iters++;
if (Math.Abs(phi - oldPhi) <= limit) break;
oldPhi = phi;
}
Console.WriteLine($"Final value of phi : {phi:0.00000000000000}");
double actualPhi = (1.0 + Math.Sqrt(5.0)) / 2.0;
Console.WriteLine($"Number of iterations : {iters}");
Console.WriteLine($"Error (approx) : {phi - actualPhi:0.00000000000000}");
}
public static void Main(string[] args) {
Iterate();
}
}
</syntaxhighlight>
{{out}}
<pre>
Final value of phi : 1.61803278688525
Number of iterations : 14
Error (approx) : -0.00000120186465
</pre>
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