import java.util.Arrays;

public class Demo3
{
   public static void main(String[] args)
   {
       double[][] myGrid = { {1, 2, 3},      // --> sum[0] = 1+2+3  
                             {4, 5},         // --> sum[1] = 4+5    
			     {6, 7, 8, 9} }; // --> sum[2] = 6+7+8+9
       double[]   sum = new double[myGrid.length];

       // Compute sum[i] = sum all elements in row i in myGrid
       for ( int i = 0; i < myGrid.length; i++ )
       {
           sum[i] = 0;
           for ( int j = 0; j < myGrid[i].length; j++ )
               sum[i] = sum[i] + myGrid[i][j];
       }
            
       System.out.println( Arrays.toString(sum) );
   } 
}