[SWEA] 2058. 자릿수 더하기(JAVA)

import java.util.Scanner;
 
// 2058. 자릿수 더하기
public class Solution2058 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String N = sc.nextLine();  //(1<=N<=9999)
        int sum = 0;
        for(int i=0; i<N.length(); i++) {
            int n = N.charAt(i)-'0';
            sum += n;
        }
        System.out.println(sum);
    }
}

> BestSolution

import java.util.Scanner;
class Solution {
    public static void main(String[] args) {    
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int sum = 0;
        while(N>0) {
            sum += N%10;
            N /= 10;
        }
        System.out.print(sum);
    }
}

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6789

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30