The trace of the matrix is given by the sum of its elements of its major diagonal. Write a program to evaluate the trace of the above matrix

   1:  #include<stdio.h>

   2:  #include<conio.h>

   3:  void main()

   4:  {

   5:  int i,j,sum=0;

   6:  int x[4][4]={

   7:          {2,4,6,8},

   8:          {3,5,7,9},

   9:          {4,2,6,8},

  10:          {1,3,5,7},

  11:          };

  12:  for(i=0;i<4;i++)

  13:      {

  14:      for(j=0;j<4;j++)

  15:      {

  16:      if(i==j)

  17:      sum+=x[i][j];

  18:      printf("%5d",x[i][j]);

  19:      }

  20:      printf("\n");

  21:      }

  22:  printf("the trace of the matrix is: %d\n",sum);

  23:  getch();

  24:  }