Multiplication of Two Matrix in Java of Same Dimensions using For loop

Multiplication of two matrix in java of same dimensions using for loop. In this article, you will learn how to make program of multiplication of two matrix in java of same dimensions using for loop.

Matrix Multiplication Formula

Source Code

// Multiplication of Two Matrix in Java of Same Dimensions using For loop
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int r, c, i, j, k;
        
        // r - To store number of rows
        // c - To store number of columns
        
        System.out.println ("Enter the number of rows & columns of the matrix::\n");
        r = in.nextInt();
        c = in.nextInt();
        
        int x[][], y[][], m[][];

        x = new int[r + 1][c + 1];
        y = new int[r + 1][c + 1];
        m = new int[r + 1][c + 1];
        
        // x - To store first matrix elements
        // y - To store second matrix elements
        // m - To store multiplication of matrices
        
        System.out.println ("\n---Enter the first matrix's elements---");
        
        for (i = 0; i < r; i++) { 
            for(j = 0; j < c; j++) {    
                x[i][j] = in.nextInt();
            }    
        }
        
        System.out.println ("---Enter the second matrix's elements---");
        
        for(i = 0; i < r; i++) {    
            for(j = 0; j < c; j++) {    
                y[i][j] = in.nextInt();
            }    
        }    
            
        System.out.println ("\n\n-----The multiplication of the matrices is-----\n");
        
        // It's the calculation of matrices's multiplications
        for(i = 0; i < r; i++) {    
            for(j = 0; j < c; j++) {    
                m[i][j] = 0;    
                for(k = 0; k < c; k++) {    
                    m[i][j] += x[i][k] * y[k][j];    
                }    
            }    
        }
        
        // This will display matrices's outputs
        for(i = 0; i < r; i++) {
            System.out.print ("\t");
            for(j = 0; j < c; j++) {    
                System.out.print (m[i][j] + "\t");    
            }
            System.out.println ("\n");    
        }
    }
}

Run Program

Output