Study of 2D Array.
  #include <stdio.h>

int main(void)
{
int arr[3][2]; /* Array representing a matrix of 3 rows and 2 cols */
int i, j;

/* Assigning values to array elements */
arr[0][0] = 10; arr[0][1] = 20;
arr[1][0] = 30; arr[1][1] = 40;
arr[2][0] = 50; arr[2][1] = 60;

printf( "\nDisplaying array elements : " );
for(i = 0 ; i < 3 ; i++)
{
printf("\n");
for(j = 0 ; j < 2 ; j++)
printf("%d\t", arr[i][j]);
}

return 0;
}