Java Program to Perform Matrix Multiplication

          In the current post, I have written a java program to perform a simple matrix multiplication. For matrix multiplication the column of the first matrix should be equal to the row of the second matrix, then only we can perform matrix multiplication.

         In matrix multiplication, one row element of first matrix is multiplied by all columns of second matrix.

Matrix multiplication example

Below is the source code of the Java Program to Perform Matrix Multiplication,

MatrixMultiplication.java,

package com.example.demo;

public class MatrixMultiplication {
 
        public static void main(String[] args) {
  
                int a[][] = {{1,2,3},{4,5,6},{7,8,9}};    
  

                int b[][] = {{1,2,3},{4,5,6},{7,8,9}};    
      
                int c[][] = new int[3][3];  //rows - 3 and columns -3 
      
                for (int i = 0; i < 3; i++) {    
   

                       for (int j = 0; j < 3; j++) {    
    

                                 c[i][j] = 0;      
    

                                 for (int k = 0; k < 3; k++) {      
     

                                       c[i][j]+= a[i][k]*b[k][j];      
    

                                 } 
    

                                 System.out.print(c[i][j]+" ");   
                         } 
   

                        System.out.println(); 
                }    
        }
}

Output:--
30 36 42 
66 81 96 
102 126 150


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