Write a program to create an array of size m X n and print the sum of all the numbers row wise in java

Answer:

Here is the program to create an array of size m X n and print the sum of all the numbers row wise in Java:

```

import java.util.Arrays;

public class ArraySumRowWise {

   public static void main(String[] args) {

       int m = 3;

       int n = 4;

       int[][] arr = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};

       // Print the original array

       System.out.println("Original Array:");

       for (int[] row : arr) {

           System.out.println(Arrays.toString(row));

       }

       // Compute and print the row wise sum

       System.out.println("Row Wise Sum:");

       for (int i = 0; i < m; i++) {

           int rowSum = 0;

           for (int j = 0; j < n; j++) {

               rowSum += arr[i][j];

           }

           System.out.println("Row " + (i+1) + ": " + rowSum);

       }

   }

}

```

Explanation:

In this program, we have created an array of size 3 X 4 and initialized it with some values. We have then printed the original array and computed the row wise sum by iterating over each row and adding up all the elements. Finally, we have printed the row wise sums. You can replace the values of m, n, and arr with your own values to test the program with different array sizes and values.

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