Java Program for Multiplication of two Matrices

Program

import java.util.Scanner; //import Scanner class in our program
class demo
{
public static void main(String…s)
{
int i,j,m,n,p,q,k;
Scanner sc=new Scanner(System.in); //used to read from keyboard

System.out.print(“Enter number of rows and columns of first matrix:”);
m=sc.nextInt();
n=sc.nextInt();
System.out.print(“Enter number of rows and columns of second matrix:”);
p=sc.nextInt();
q=sc.nextInt();

if(n!=p)
System.out.print(“nSorry multiplication can’t be done!!”);
else
{
int a1[][]=new int[m][n];
int a2[][]=new int[p][q];
int a3[][]=new int[m][q]; //resultant matrix will be of size mxq

System.out.print(“nEnter elements of first matrix:n”);
for(i=0;i<m;++i)
for(j=0;j<n;++j)
a1[i][j]=sc.nextInt();

System.out.print(“nEnter elements of second matrix:n”);
for(i=0;i<p;++i)
for(j=0;j<q;++j)
a2[i][j]=sc.nextInt();

System.out.print(“nMultiplication of Matrices:n”);

for(i=0;i<m;++i)
{
for(j=0;j<q;++j)
{
    a3[i][j]=0;
for(k=0;k<n;++k)
    a3[i][j]=a3[i][j]+(a1[i][k]*a2[k][j]);

System.out.print(a3[i][j]+” “);
}
System.out.print(“n”);
}
}
}
}

Output