public static long sum(final long[] values) {
		long sum = 0;
		for (int i = values.length; --i >= 0;) {
			sum += values[i];
		}
		return sum;
	}
Return the sum of the given double array.

@since 4.0

@param values the values to sum up.
@return the sum of the given {@code values}.
@throws NullPointerException if the given array is {@code null}.
jenetics/src/main/java/io/jenetics/stat/LongSummary.java