[SW Expert Academy] Digit sum (D3)

https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AWHPiSYKAD0DFAUn&categoryId=AWHPiSYKAD0DFAUn&categoryType=CODE&problemTitle=DIGIT+SUM&orderBy=FIRST_REG_DATETIME&selectCodeLang=ALL&select-1=&pageSize=10&pageIndex=1

SW Expert Academy

import java.util.Scanner;

class Solution {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int t = sc.nextInt();

		for (int tc = 1; tc <= t; tc++) {

			int result = 0;

			String str = sc.next();

			while (str.length() > 1) {
				
				result=0;

				for (int i = 0; i < str.length(); i++) {
					result += str.charAt(i) - '0';
				}

				str = Integer.toString(result);

			}
			
			System.out.println("#"+tc+" "+str);

		}

	}
}