Row Wise Sum

 Row Wise Sum

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For a given two-dimensional integer array/list of size (N x M), find and print the sum of each of the row elements in a single line, separated by a single space.

Input Format :

The first line contains an Integer 't' which denotes the number of test cases or queries to be run. Then the test cases follow.

First line of each test case or query contains two integer values, 'N' and 'M', separated by a single space. They represent the 'rows' and 'columns' respectively, for the two-dimensional array/list.

Second line onwards, the next 'N' lines or rows represent the ith row values.

Each of the ith row constitutes 'M' column values separated by a single space.

Output Format :

For each test case, print the sum of every ith row elements in a single line separated by a single space.

Output for every test case will be printed in a seperate line.

Constraints :

1 <= t <= 10^2
0 <= N <= 10^3
0 <= M <= 10^3
Time Limit: 1sec

Sample Input 1:

1
4 2 
1 2 
3 4 
5 6 
7 8

Sample Output 1:

3 7 11 15 

Sample Input 2:

2
2 5 
4 5 3 2 6 
7 5 3 8 9
4 4
1 2 3 4
9 8 7 6
3 4 5 6
-1 1 -10 5

Sample Output 2:

20 32 
10 30 18 -5 

code for this

import java.util.Scanner;
public class Solution {
    public static void rowWiseSum(int[][] mat) {
        if (mat.length == 0) {
            return;
        }
        for (int i = 0; i < mat.length; i++) {
            int Sum = 0;
            for (int j = 0; j < mat[0].length; j++) {
                Sum = Sum + mat[i][j];
            }
            System.out.print(Sum + " ");
        }
        System.out.println(); // Move to the next line after printing row sums
    }
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int t = scanner.nextInt(); // Number of test cases
        for (int i = 0; i < t; i++) {
            int n = scanner.nextInt(); // Number of rows
            int m = scanner.nextInt(); // Number of columns
            int[][] matrix = new int[n][m];
            for (int j = 0; j < n; j++) {
                for (int k = 0; k < m; k++) {
                    matrix[j][k] = scanner.nextInt();
                }
            }
            rowWiseSum(matrix); // Calculate and print row-wise sums
        }
    }
}