Data commit

Task/Eulers-constant-0.5772.../Java/eulers-constant-0.5772....java

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+/**
+ * Using a simple formula derived from Hurwitz zeta function,
+ * as described on https://en.wikipedia.org/wiki/Euler%27s_constant,
+ * gives a result accurate to 12 decimal places.
+ */
+public class EulerConstant {
+
+	public static void main(String[] args) {		
+		System.out.println(gamma(1_000_000));
+	}
+
+    private static double gamma(int N) {
+		double gamma = 0.0;
+		
+		for ( int n = 1; n <= N; n++ ) {
+			gamma += 1.0 / n;
+		}
+		
+		gamma -= Math.log(N) + 1.0 / ( 2 * N );
+		
+		return gamma;
+	}
+	
+}