#include < cstdio >
using namespace std;
int main()
{
int i, j, n;
/*n : this program will print all the prime numbers between
1 and n. */
printf("Give me an integer: ");
scanf("%d", &n); // get the value of n.
for(i = 2; i <= n; i++) { // i represent all the integers between 2 and n.