Объясните.
package com.javarush.task.task04.task0432;
import java.util.Scanner;
public class Solution {
public static void main(String[] args) throws Exception {
Scanner skan =new Scanner (System.in);
String a;
a=skan.nextLine();
int b;
b=skan.nextInt();
while (b>1)
{
System.out.println(b);
b--;
}
}
}