PROGRAM TO PRINT AND CALCULATE SUM OF RIGHT/SECONDARY DIAGONAL ELEMENTS OF MATRIX IN FOUR DIFFERENT LOGIC BY ICSE X STUDENTS

PROGRAM TO PRINT AND CALCULATE SUM OF RIGHT/SECONDARY DIAGONAL ELEMENTS OF MATRIX  IN FOUR DIFFERENT LOGIC BY SCHOOL STUDENTS

import java.util.Scanner;

public class RightDiagonal

{

public static void main(String[] args) {

Scanner s=new Scanner(System.in);

System.out.println("Enter the number of rows and columns");

int r=s.nextInt();

int c=s.nextInt();

int a[][]=new int[r][c];

System.out.println("Enter the Elements of matrix ");

for(int i=0;i<r;i++)

{

   for(int j=0;j<c;j++)

    {

   a[i][j]=s.nextInt();

     }

}

/* Logic No. 1 

for(int i=0;i<r;)

{

  for(int j=c-1;j>=0;j--,i++)

                       {

           System.out.println(a[i][j]);

            sum=sum+a[i][j];

       }

}

*/

/* OR Logic no. 2 

for(int i=0;i<r;i++)

{

  for(int j=0;j<c;j++)

              {

           System.out.println(a[i][j]);

            sum=sum+a[i][c-1-i];

       }

}

*/

/*OR Logic No. 3 

int a=0,b=c-1;

for(int i=0;i<r;i++)

{

  for(int j=0;j<c;j++)

              {

            sum=sum+a[a][b];

            a++; b--;

      }

}

*/

/*Logic No. 4 

j=n-1;

for(int i=0;i<r;i++)

{

sum=sum+a[i][j];

j--;

}

*/

System.out.println("sum="+sum);

}

}