C#: Find the sum of left diagonals of a matrix

C# Sharp Array: Exercise-24 with Solution

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

Sample Solution:-

C# Sharp Code:

using System;

public class Exercise24 
{  
    public static void Main()
    {
        int i, j, sum = 0, n, m = 0; // Declare variables for iteration, sum, matrix size, and auxiliary variable m
        int[,] arr1 = new int[50, 50]; // Declare the matrix

        Console.Write("\n\nFind the sum of left 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
        m = n; // Store the size of the matrix in the auxiliary variable m

        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
            }
        }  

        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");
        }

        // Calculate the sum of left diagonals
        for (i = 0; i < n; i++)
        {
            m = m - 1; // Decrease m for each row iteration
            for (j = 0; j < n; j++)
            {
                if (j == m)
                {
                    sum += arr1[i, j]; // Accumulate the sum of left diagonal elements
                }
            }
        }
        Console.Write("Addition of the left Diagonal elements is : {0}\n", sum); // Display sum of left diagonal elements
    }
}

	

Sample Output:

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

Flowchart:

C# Sharp Code Editor:

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