allintitle:Java program to find trace of a matrix code example

Example: Java program to find trace of a matrix

// Java program to find trace of a matrix
import java.util.Scanner;
public class TraceMatrixDemo 
{
   public static void main(String[] args) 
   {
      int[][] arrInput = new int[10][10];
      int a, b;
      double total = 0;
      System.out.println("Please enter total rows and columns: ");
      Scanner sc = new Scanner(System.in);
      int row = sc.nextInt();
      int column = sc.nextInt();
      System.out.println("Please enter matrix: ");
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < column; b++) 
         {
            arrInput[a][b] = sc.nextInt();
            System.out.print(" ");
         }
      }
      System.out.println("Entered matrix is: ");
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < column; b++)
         {
            System.out.println(arrInput[a][b] + " ");
         }
         System.out.println(" ");
      }
      System.out.println("Trace of a matrix: ");
      for(a = 0; a < row; a++)
      {  
         for(b = 0; b < column; b++)
         {
            if(a == b)
            {
               total = total + (arrInput[a][b]);
            }
         }
      }
      System.out.println(total);
      sc.close();
   }
}