Matrix_product.java

import java.util.Scanner;

public class Main
{

  public static void main(String args[]) 
  {
    int r1, c1, r2, c2;
    Scanner s = new Scanner(System.in);

    System.out.print("Enter number of rows in first matrix: ");
    r1 = s.nextInt();

    System.out.print("Enter number of columns in first matrix: ");
    c1 = s.nextInt();

    System.out.print("Enter number of rows in second matrix: ");
    r2 = s.nextInt();

    System.out.print("Enter number of columns in second matrix: ");
    c2 = s.nextInt();

    if (c1 != r2) 
    {
      System.out.println("Matrix multiplication is not possible");
      return;
    }

    int a[][] = new int[r1][c1];
    int b[][] = new int[r2][c2];
    int c[][] = new int[r1][c2];

    System.out.println("\nEnter " +(r1*c1)+ " values for matrix A : ");
    for (int i = 0; i < r1; i++) 
    {
      for (int j = 0; j < c1; j++) 
      a[i][j] = s.nextInt();
    }
    System.out.println("\nEnter " +(r2*c2)+ " values for matrix B : ");
    for (int i = 0; i < r2; i++) 
    {
      for (int j = 0; j < c2; j++) 
      b[i][j] = s.nextInt();
    }

    System.out.println("\nMatrix multiplication is : ");
    for (int i = 0; i < r1; i++) 
    {
      for (int j = 0; j < c2; j++) 
      {
       
        c[i][j] = 0;

          for (int k = 0; k < c1; k++) 
          {
          c[i][j] += a[i][k] * b[k][j];
          }
        
        System.out.print(c[i][j] + "\t");
      }
      System.out.println();
    }
  }
}