[java] 백준 알고리즘 8393번 합 풀이소스

* 풀이소스

public class Baekjoon8393{
    
    public static void main(String[] args) throws NumberFormatException, IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        int n = Integer.parseInt(br.readLine());
        long sum = 0;
        
        for(int i=1; i<=n; i++){
            sum += i;
        }
        
        System.out.println(sum);
    }
}