public class CountDown
{
    public static void countDown(int n)
    {
        //""" n >= 0, counts down to zero"""
        //for(init; test; between)
        //{
        //    BLOCK
        //}
        // 1. init runs when the loop is first seen
        // 2. test is evaluated. If true, block evaluates
        // 3. between evaluates
        // 4. test -> between -> block repeates until test is false
        //
        // init
        // while(test)
        // {
        //     BLOCK
        //     between
        // }
        for(/*init*/;n >= 0; n--)
        {
            System.out.println(n);
        }
    }
    public static void main(String [] args)
    {
        countDown(10);
    }
}