题解 | 数位之和

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        
        int sum = 0;
        if(n < 0){
            n = Math.abs(n);
        }else{
            while(n != 0){
                int ge = n % 10;
                n = n / 10;
                sum += ge;
            }
        }
      
        System.out.println(sum);
    }
}