Chapter4_Loops_Ex5

import java.util.Scanner;
/*
    =====================================================
                   chapter 4: Loops

      Ex5: change digits place
    =====================================================
*/

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

        //variables
        int num,tmp,count=1;
        int newNum=0;
        int twoDig;
        Scanner s=new Scanner(System.in);

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

        while(tmp/10>0){

            twoDig=tmp%100;
            twoDig=(twoDig%10)*10+(twoDig/10);
            newNum+= twoDig*count;

            tmp/=100;
            count*=100;
        }

        if(tmp>0)
            newNum+=(tmp%10)*count;

        System.out.println("old: "+num+" new: "+newNum);


    }
}