Question

1. I need a java program that prints the following rows of arrays, like shown

[3,5,6

7, 61, 71,

9, 99, 999,

4, 1, 0]

2. I also need a program that prints the sum of all the arrays

3. and a third program that only prints the elements from row one.

Thanks!

Answer 1

public class Main
{
   public static void main(String[] args) {
int sum;
   int arr[][]={ {3,5,6},{7,61,71},{9,99,999},{4,1,0}};//declare arr of size 4 rows 3 columns
// to print array contents row wise
   for(int i=0;i<4;i++)
   {
   for(int j=0;j<3;j++)
   System.out.print(arr[i][j]+" ");
  
   System.out.print("\n");
   }
   //to print sum row wise
   for(int i=0;i<4;i++)
   {
   sum=0;
   for(int j=0;j<3;j++)
       sum=sum+arr[i][j];
      
       System.out.println("Sum of row "+(i+1) +" is :"+sum);
   }
   //print elements of row 1
   System.out.println("\nThe elements of Row1 are :");
   for(int i=0, j=0;j<3;j++)
   System.out.print(arr[i][j]+" ");
   }//end main()
}//end class