Write a JAVA program to determine multiplication of two matrices.

Aim: Write a JAVA program to determine multiplication of two matrices.

Program:

import java.util.Scanner;

 

class MatrixMultiplication

{

   public static void main(String args[])

   {

      int m, n, p, q, sum = 0, c, d, k;

 

      Scanner in = new Scanner(System.in);

      System.out.println("Enter the number of rows and columns of first matrix");

      m = in.nextInt();

      n = in.nextInt();

 

      int first[][] = new int[m][n];

 

      System.out.println("Enter the elements of first matrix");

 

      for ( c = 0 ; c < m ; c++ )

         for ( d = 0 ; d < n ; d++ )

            first[c][d] = in.nextInt();

 

      System.out.println("Enter the number of rows and columns of second matrix");

      p = in.nextInt();

      q = in.nextInt();

 

      if ( n != p )

         System.out.println("Matrices with entered orders can't be multiplied with each other.");

      else

      {

         int second[][] = new int[p][q];

         int multiply[][] = new int[m][q];

 

         System.out.println("Enter the elements of second matrix");

 

         for ( c = 0 ; c < p ; c++ )

            for ( d = 0 ; d < q ; d++ )

               second[c][d] = in.nextInt();

 

         for ( c = 0 ; c < m ; c++ )

         {

            for ( d = 0 ; d < q ; d++ )

            {   

               for ( k = 0 ; k < p ; k++ )

               {

                  sum = sum + first[c][k]*second[k][d];

               }

 

               multiply[c][d] = sum;

               sum = 0;

            }

         }

 

         System.out.println("Product of entered matrices:-");

 

         for ( c = 0 ; c < m ; c++ )

         {

            for ( d = 0 ; d < q ; d++ )

               System.out.print(multiply[c][d]+"\t");

 

            System.out.print("\n");

         }

      }

   }

}

Output: