Java: Adds up columns and rows of given table as shown in the specified figure

Last update on May 13 2025 12:59:58 (UTC/GMT +8 hours)

Add Rows and Columns of Spreadsheet Table

Your task is to develop a small piece of spreadsheet software. Write a Java program that adds up the columns and rows of a given table as shown in the specified figure.

Visual Presentation:

Input:
n (the size of row and column of the given table)
1st row of the table
2nd row of the table
:
:
n th row of the table
The input ends with a line consisting of a single 0.
Output:
For each dataset, print the table with sum of rows and columns.

Sample Solution:

Java Code:

// Importing the necessary Java utility package
import java.util.*;

// Main class named "Main"
public class Main {

    // Main method, the entry point of the program
    public static void main(String[] args) {

        // Creating a Scanner object to read input from the console
        Scanner sc = new Scanner(System.in);

        // Prompting the user to input the number of rows/columns (0 to exit)
        System.out.println("Input number of rows/columns (0 to exit)");

        // Continuous loop to handle multiple inputs until 0 is entered
        while (true) {

            // Reading an integer from the user
            int n = sc.nextInt();

            // Checking if the entered value is 0, and breaking the loop if true
            if (n == 0) break;

            // Creating a 2D array 'map' with dimensions (n+1) x (n+1)
            int[][] map = new int[n + 1][n + 1];

            // Nested loops to populate the 'map' array with user inputs and calculate row sums
            for (int i = 0; i < n; i++) {
                for (int j = 0; j < n; j++) {
                    map[i][j] = sc.nextInt();
                    map[i][n] += map[i][j];
                }
                map[n][n] += map[i][n];
            }

            // Nested loops to calculate column sums
            for (int i = 0; i < n; i++) {
                for (int j = 0; j < n; j++) {
                    map[n][i] += map[j][i];
                }
            }

            // Printing the result header
            System.out.println("Result:");

            // Nested loops to print the final 'map' array
            for (int i = 0; i < n + 1; i++) {
                for (int j = 0; j < n + 1; j++) {
                    // Formatting and printing each element of the array
                    System.out.printf("%5d", map[i][j]);
                }
                // Moving to the next line after each row is printed
                System.out.println();
            }
        }
    }
} 

Sample Output:

Input number of rows/columns (0 to exit)
4
25 69 51 26
68 35 29 54
54 57 45 63
61 68 47 59
Result:
   25   69   51   26  171
   68   35   29   54  186
   54   57   45   63  219
   61   68   47   59  235
  208  229  172  202  811

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to compute the sum of each row and column in a spreadsheet and identify the row with the maximum total.
• Write a Java program to add rows and columns of a table and then compute the average for each row.
• Write a Java program to sum the rows and columns of a table and display the result in a formatted matrix.
• Write a Java program to perform row and column summation on a table and then transpose the resulting sum matrix.

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