Chapter4_Loops_Ex2

import java.util.Scanner;

/*
    =====================================================
                   chapter 4: Loops

      Ex2: new number containing only even indexes digits
    =====================================================
*/

public class MyProgram {
    public static void main(String[] args) {

        //variables
        int number;
        int newNumber=0;
        int tmp,counter=0;
        int digit;
        int place=1;
        Scanner s=new Scanner(System.in);

        //user input
        System.out.println("please enter a number: ");
        number=s.nextInt();
        tmp=number;     //keeping the number intact

        while(tmp>0){
            digit=tmp%10;
            if(counter%2==0){
                newNumber+=place*digit;
                place*=10;

            }
            counter++;
            tmp/=10;

        }
        System.out.println("new number is: "+newNumber);

    }
}