백준 8393번 합 JAVA(자바) 문제 풀이

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		
		int A = scan.nextInt();
		scan.close();
		int B = 0;
		for(int i=0; i<=A; i++) {
			B += i;
		}
		System.out.println(B);
	}
}