Write a program to display an array of given numbers

#include <stdio.h>
int main()
{
int arr[]={1,2,3,4,5,6,7,8,9};
int *ptr1, *ptr2;
ptr1 = arr;
ptr2 = &arr[8];
while(ptr1<=ptr2)
{
printf("%d", *ptr1);
ptr1++;
}
return 0;
}