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【アルゴリズム】桁の足し算

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問題説明

自然数Nを受け取って、Nの各桁の足し算を行いreturnするsolutionメソッドを作成してください。
例)N=123の場合、1 + 2 + 3 = 6をreturn。

条件

  • Nの範囲:100,000,000以下の自然数

入出力の例

N answer
123 6
987 24

解説

※解説は私が作成したコードなので、もっといいアルゴリズム等々ありましたら、共有してください!


public class Solution {
    public int solution(int n) {
        // 合計を保存用
        int sum = 0;
        while(n > 0) {
            sum += n % 10; // 10で割り算して余りを足していく。
            n /= 10;  // 10で割り算した結果を次の計算に使うためnに代入。
        }

        return sum;
    }
}
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