matrix in c

#include <stdio.h>

int main() {
int rows=5;
int cols=6;
int i, j;

int mat[rows][cols]={
    {57,67,77,87,97,107 },
    {117, 127, 137, 147,157,167},
    {177, 187, 197, 207,217,227},
    {237, 247, 257, 267,277,287},
    {297, 307, 317, 327,337,347}
};
printf("Matrix values are:\n");
   for(i=0; i<rows; i++) {
      for(j=0;j<cols;j++) {
        printf("%d ", mat[i][j]);
            printf("\n");
      }
   }

printf("Two Dimensional array elements on even coordinate:\n");
   for(i=0; i<rows; i++) {
      for(j=0;j<cols;j++) {
         if( i%2 ==0 && j%2==0){
            printf("%d ", mat[i][j]);
            printf("\n");
         }
      }
   }
return 0;
}