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Question

program to print boundary elements of matrix

Matrix  = [9, 8, 7]
          [6, 5, 4]
          [3, 2, 1]

BOUNDARY ELEMENTS OF MATRIX
9  8  7
6     4
3  2  1

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Code

import java.util.Scanner;
public class BoundaryElementsOfMatrix
{
    public static void main(String[] args)
    {
        int row=0,col=0,i=0,j=0;
        int a[][];


        Scanner sc=new Scanner(System.in);
        System.out.println("ENTER THE NUMBER OF ROW OF MATRIX");
        row=sc.nextInt();
        System.out.println("ENTER THE NUMBER OF COLUMN OF MATRIX");
        col=sc.nextInt();

        a=new int[row][col];
        System.out.println("ENTER THE ELEMENTS IN MATRIX");
        for(i=0;i< row;i++)
        {
            for(j=0;j< col;j++)
            {
                a[i][j]=sc.nextInt();
            }
        }
        System.out.println("Matrix:");
        for(i=0;i< row;i++)
        {
            for(j=0;j< col;j++)
            {
                System.out.print(a[i][j]+" ");
            }
            System.out.println();
        }

        System.out.println("BOUNDARY ELEMENTS OF MATRIX");

        for(i=0;i< row;i++)
        {
            for(j=0;j< col;j++)
            {

                if(i==0 ||j==0||i==(row-1)||j==(col-1))
                {
                    System.out.print(a[i][j]+" ");

                }
                else
                {
                    System.out.print("  ");
                }

            }
                System.out.println();
        }

    }
}

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