Shell Sort

public class ShellSort {
    public static int[] sort(int[] arr)
    {

        int position = Math.round(arr.length/2);
        int temp=0;
        int j=0;

        while (position > 0)
        {
            for (int i=position;i<arr.length;i++)
            {
                temp = arr[i];
                j=i;
                while (j>position && arr[j-position] > temp)
                {
                    arr[j] = arr[j-position];
                    j=j-position;
                }
                arr[j]=temp;
            }

            position = Math.round(position/2);
        }

        return arr;
    }
}