how to add two matrix in java

June 16, 2020

For adding two matrix we have to follow some steps . Let’s see how we can add two matrix in java.

First we have two matrix with same size of row and column , so we first take input of row and column.
After getting number of row and column , we take input of first matrix then second.
Create in another matrix to store sum of those two matrix.
Traverse each element of the two matrices and add them. Store this sum in the new matrix at the corresponding index.
Finally we print the result of addition that we have stored in another third matrix.

Simple program to add two matrix in java

import java.util.Scanner;

class MatrixAddition {

   public static void main(String[] args) {
       Scanner in = new Scanner(System.in);
       System.out.print("Enter number of rows: ");
       int rows = in.nextInt();
       System.out.print("Enter number of columns: ");
       int columns = in.nextInt();
       int a[][] = new int[rows][columns];
       int b[][] = new int[rows][columns];
       System.out.println("Give the Elements for first matrix");
       for (int i = 0; i < rows; i++) {
           for (int j = 0; j < columns; j++) {
               a[i][j] = in.nextInt();
           }
       }
       System.out.println("Elements for second matrix");
       for (int i = 0; i < rows; i++) {
           for (int j = 0; j < columns; j++) {
               b[i][j] = in.nextInt();
           }
       }
       int c[][] = new int[rows][columns];
       for (int i = 0; i < rows; i++) {
           for (int j = 0; j < columns; j++) {
               c[i][j] = a[i][j] + b[i][j];
           }
       }
       System.out.println("The sum of the two matrices is");
       for (int i = 0; i < rows; i++) {
           for (int j = 0; j < columns; j++) {
               System.out.print(c[i][j] + " ");
           }
           System.out.println(" ");
       }
   }
}

Output

Enter number of rows: 2
Enter number of columns: 3
Give the Elements for first matrix
1
2
3
4
5
6
Enter the Elements for second matrix
6
5
4
3
2
1
The sum of the two matrices is
7 7 7
7 7 7