explain me
package com.codegym.task.task04.task0427;
/*
Describing numbers
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
InputStreamReader input = new InputStreamReader(System.in);
BufferedReader reader = new BufferedReader(input);
String number = reader.readLine();
int num = Integer.parseInt(number);
int length = number.length();
int odd = num % 2;
// start for one length
if((num > 1) && (num < 999)) {
if(length == 1) {
if(odd == 0) {
System.out.println("even single-digit number");
} else {
System.out.println("odd single-digit number");
}
} else if(length == 2) {
if(odd == 0) {
System.out.println("even two-digit number");
} else {
System.out.println("odd two-digit number");
}
} else if(length == 3) {
if(odd == 0) {
System.out.println("even three-digit number");
} else {
System.out.println("odd three-digit number");
}
}
}
}
}