Lv1. 자릿수 더하기

▶ 문제

 

▶ 풀이방법

- 첫번째

public class Solution {
    public int solution(int n) {
        int answer = 0;

        String num = String.valueOf(n);
        
        for(int i = 0; i < num.length(); i++){
            answer += Integer.parseInt(num.substring(i, i+1));
        }
        
        return answer;
    }
}

 

- 두번째

public class Solution {
    public int solution(int n) {
        int answer = 0;
        String[] num = String.valueOf(n).split("");
        for(String s : num) answer += Integer.parseInt(s);
        
        return answer;
    }
}