Udemy_16.FirstAndLastDigit

package lista.Alapok;

public class Main {

    public static int sumFirstAndLastDigit (int number) {
        int first=0, last;

       if(number<0) return -1;

       else {
           last=number%10;

           while(number>0) {
               first=number%10;
               number=number/10;
           }
        }
        return first+last;
    }

    public static void main(String[] args) {
       System.out.println(sumFirstAndLastDigit(102));
    }
}