Write a java program to perform matrix multiplicationinput:m-no. of rowsn-no.of columsmatrix1=[]matrix2=[]output:matrix3=[]

Here’s a Java program that performs matrix multiplication based on the given input structure. The user is prompted to enter the dimensions of the matrices and their elements, and the program outputs the resulting matrix after multiplication.

import java.util.Scanner;

public class MatrixMultiplication {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        // Input dimensions for matrix 1
        System.out.print("Enter the number of rows for matrix 1 (m): ");
        int m = scanner.nextInt();
        System.out.print("Enter the number of columns for matrix 1 (n): ");
        int n = scanner.nextInt();

        // Input dimensions for matrix 2
        System.out.print("Enter the number of rows for matrix 2 (n): ");
        int n2 = n; // same as the columns of matrix 1
        System.out.print("Enter the number of columns for matrix 2 (p): ");
        int p = scanner.nextInt();

        // Ensure matrix multiplication is possible
        if (n2 != m) {
            System.out.println("Matrix multiplication is not possible. Columns of matrix 1 must equal rows of matrix 2.");
            return;
        }

        // Initialize matrices
        int[][] matrix1 = new int[m][n];
        int[][] matrix2 = new int[n][p];
        int[][] matrix3 = new int[m][p];

        // Input matrix 1
        System.out.println("Enter elements of matrix 1:");
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                matrix1[i][j] = scanner.nextInt();
            }
        }

        // Input matrix 2
        System.out.println("Enter elements of matrix 2:");
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < p; j++) {
                matrix2[i][j] = scanner.nextInt();
            }
        }

        // Matrix multiplication
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < p; j++) {
                for (int k = 0; k < n; k++) {
                    matrix3[i][j] += matrix1[i][k] * matrix2[k][j];
                }
            }
        }

        // Output the resulting matrix
        System.out.println("Resulting matrix after multiplication:");
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < p; j++) {
                System.out.print(matrix3[i][j] + " ");
            }
            System.out.println();
        }

        scanner.close();
    }
}

Instructions to Run the Program

1. Copy the code above into a file named MatrixMultiplication.java.
2. Compile the program using the command: javac MatrixMultiplication.java
3. Run the program using the command: java MatrixMultiplication
4. Follow the prompts to enter the dimensions and elements of the matrices.

Functionality

• The program checks if matrix multiplication is possible by validating the dimensions.
• It performs the multiplication and outputs the resulting matrix.