Loops Practise(positive number)

#include <iostream.h>
int main ()
{
    int number;
    cout <<"ENTER POSITIVE NUMBER\n";
    cin >> number;
    while (number<0)
    {
        cout <<"NUMBER MUST BE POSITIVE\n";
        cout <<"PLEASE RE-ENTER : ";
        cin >> number;
    } // end while

    }