Matrix Subtraction Example Java Program


Definition

A matrix (plural matrices) is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns that is treated in certain prescribed ways. Matrix subtraction is the operation of subtracting two matrices by subtracting the corresponding entries together. Two matrices must have an equal number of rows and columns to be subtracted. The difference between two matrices A and B will be a matrix which has the same number of rows and columns as do A and B. The difference of A and B, denoted A - B, is computed by subtracting corresponding elements of A and B.

Matrix Subtraction Example Program

import java.util.Scanner;
class MatrixSubtraction{
	public static void main(String args[]){
		int rows,columns, c, d;
		Scanner in = new Scanner(System.in);
		System.out.println("Enter the number of rows and columns of matrix");
		rows= in.nextInt();
		columns  = in.nextInt();
		int matrix1[][] = new int[rows][columns];
		int matrix2[][] = new int[rows][columns];
		int diff[][] = new int[rows][columns];
		System.out.println("Enter the elements of matrix1");
		for (  c = 0 ; c < rows ; c++ ){
			for ( d = 0 ; d < columns ; d++ ){
				matrix1[c][d] = in.nextInt();
			}
		}
		System.out.println("Enter the elements of matrix2");
		for ( c = 0 ; c < rows ; c++ ){
			for ( d = 0 ; d < columns ; d++ ){
				matrix2[c][d] = in.nextInt();
			}
		}
		for ( c = 0 ; c < rows ; c++ ){
			for ( d = 0 ; d < columns ; d++ ){
				diff[c][d] = matrix1[c][d] - matrix2[c][d];  
			}
		}
		System.out.println("Difference of entered matrices:-");
		for ( c = 0 ; c < rows ; c++ ){
			for ( d = 0 ; d < columns ; d++ ){
				System.out.print(diff[c][d]+"\t");
			} 
			System.out.println();
		}
	}
}

Sample Output

Output is:
Enter the number of rows and columns of matrix
3
3
Enter the elements of matrix1
8
6
2
8
5
4
7
3
2
Enter the elements of matrix2
9
5
8
2
4
1
7
6
5
Difference of entered matrices:-
-1      1       -6
6       1       3
0       -3      -3