C#: Find sum of right diagonals of a matrix

Last update on December 20 2024 12:36:35 (UTC/GMT +8 hours)

Write a C# Sharp program to find the sum of the right diagonals of a matrix.

Sample Solution:-

C# Sharp Code:

using System;

public class Exercise23  
{  
    public static void Main()
    {
        int i, j, sum = 0, n; // Declare variables for iteration, sum, and matrix size
        int[,] arr1 = new int[50, 50]; // Declare the matrix

        Console.Write("\n\nFind sum of right diagonals of a matrix :\n");
        Console.Write("---------------------------------------\n");	
	
        Console.Write("Input the size of the square matrix : ");
        n = Convert.ToInt32(Console.ReadLine()); // Input the size of the square matrix

        Console.Write("Input elements in the matrix :\n");
        for (i = 0; i < n; i++)
        {
            for (j = 0; j < n; j++)
            {
                Console.Write("element - [{0}],[{1}] : ", i, j);
                arr1[i, j] = Convert.ToInt32(Console.ReadLine()); // Input matrix elements
                if (i == j) // Check if it's the right diagonal (i.e., where row index equals column index)
                {
                    sum += arr1[i, j]; // Accumulate the sum of the right diagonal elements
                }
            }
        }  

        Console.Write("The matrix is :\n");
        for (i = 0; i < n; i++)
        {
            for (j = 0; j < n; j++)
            {
                Console.Write("{0} ", arr1[i, j]); // Display the matrix
            }
            Console.Write("\n");
        }

        Console.Write("Addition of the right Diagonal elements is : {0}\n", sum); // Display sum of right diagonal elements
    }
}

Sample Output:

Find sum of right diagonals of a matrix :                                                                     
---------------------------------------                                                                       
Input the size of the square matrix : 3                                                                       
Input elements in the first matrix :                                                                          
element - [0],[0] : 1                                                                                         
element - [0],[1] : 2                                                                                         
element - [0],[2] : 3                                                                                         
element - [1],[0] : 4                                                                                         
element - [1],[1] : 5                                                                                         
element - [1],[2] : 6                                                                                         
element - [2],[0] : 7                                                                                         
element - [2],[1] : 8                                                                                         
element - [2],[2] : 9                                                                                         
The matrix is :                                                                                               
1 2 3                                                                                                         
4 5 6                                                                                                         
7 8 9                                                                                                         
Addition of the right Diagonal elements is :15

Flowchart:

C# Sharp Code Editor:

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