Java Program to find the normal of a matrix

This is a Java Program which calculates the normal of a given matrix. Generally normal of a matrix is calculated as the root of sum of squares of all the elements in a matrix.

PROGRAM :

package codingcorner.in;

import java.util.Scanner;

public class NormalMatrix {
 public static void main(String[] args) {
  double sum = 0;
  int rows, columns, i, j;
  double normal;
  Scanner scan = new Scanner(System.in);
  System.out.print("Enter order of matrix : \t");
  rows = scan.nextInt();
  columns = scan.nextInt();
  int matrix[][] = new int[rows][columns];
  System.out.print("Enter elements of the matrix :\n");
  for (i = 0; i < rows; i++) {
   for (j = 0; j < columns; j++) {
    System.out.print("Enter element m" + (i + 1) + (j + 1) + ":\t");
    matrix[i][j] = scan.nextInt();
   }
  }
  scan.close();
  System.out.print("\n\nMATRIX is :\n");
  for (i = 0; i < rows; i++) {
   for (j = 0; j < columns; j++)
    System.out.print(matrix[i][j] + "\t");

   System.out.print("\n");
  }
  System.out.print("\n\nIts NORMAL is:\n");
  for (j = 0; j < columns; j++) {
   for (i = 0; i < rows; i++)
    sum = sum + Math.pow(matrix[i][j], 2);

  }
  normal = Math.sqrt(sum);
  System.out.print(normal);
 }
}

OUTPUT :

Java - Normal of a matrix