[Java11] 8393번 : 합

https://www.acmicpc.net/problem/8393

 

정답

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int n = Integer.parseInt(str);
        int sum=0;
        
        for(int i=1; i<=n ; i++){
            sum+=i;
        }
         System.out.print(sum);
    }
}