Java Program to Calculate the Sum of Each Row and Column in a Matrix

Algorithm to Calculate the Sum of Each Row and Column in a Matrix

    • STEP 1: START
    • STEP 2: DEFINE rows, cols, sumRow, sumCol
    • STEP 3: INITIALIZE matrix a[][] ={{1, 2, 3},{4, 5, 6}, {7, 8, 9}}
    • STEP 4: rows = a.length
    • STEP 5: cols = a[0].length
    • STEP 6: REPEAT STEP 7 to STEP 10 UNTIL i<rows
      // for(i=0; i<rows; i++)
    • STEP 7: SET sumRow =0
    • STEP 8: REPEAT STEP 9 UNTIL j<cols
    • STEP 9: sumRow = sumRow + a[i][j]
    • STEP 10: PRINT i+1, sumRow
    • STEP 11: REPEAT STEP 12 to STEP 15 UNTIL i<cols
      //for(i=0; i<cols; i++)
    • STEP 12: SET sumCol =0
    • STEP 13: REPEAT STEP 14 UNTIL j<rows
      //for(j=0; j<rows; j++)
    • STEP 14: sumCol =sumCol + a[j][i]
    • STEP 15: PRINT i+1, sumCol
    • STEP 16: END

Java Program to Calculate the Sum of Each Row and Column in a Matrix

public class SumofRowColumn    
{    
    public static void main(String[] args) {    
        int rows, cols, sumRow, sumCol;    
            
        //Initialize matrix a    
        int a[][] = {       
                        {1, 2, 3},    
                        {4, 5, 6},    
                        {7, 8, 9}    
                    };    
              
          //Calculates number of rows and columns present in given matrix    
          rows = a.length;    
        cols = a[0].length;    
            
        //Calculates sum of each row of given matrix    
        for(int i = 0; i < rows; i++){    
            sumRow = 0;    
            for(int j = 0; j < cols; j++){    
              sumRow = sumRow + a[i][j];    
            }    
            System.out.println("Sum of " + (i+1) +" row: " + sumRow);    
        }    
            
        //Calculates sum of each column of given matrix    
        for(int i = 0; i < cols; i++){    
            sumCol = 0;    
            for(int j = 0; j < rows; j++){    
              sumCol = sumCol + a[j][i];    
            }    
            System.out.println("Sum of " + (i+1) +" column: " + sumCol);    
        }    
    }    
}

Output:

Sum of 1 row: 6
Sum of 2 row: 15
Sum of 3 row: 24
Sum of 1 column: 12
Sum of 2 column: 15
Sum of 3 column: 18

In conclusion, the provided Java program allows for the calculation of the sum of each row and column in a matrix. By iterating through the matrix and accumulating the values of each row and column, the program accurately calculates the sums. Follow tutorials.freshersnow.com to learn more.