[BOJ] 백준 8393(합) - Java

 

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

8393번: 합

 

import java.util.Scanner;

public class bj8393 {
	public static void main(String[] args) {
		
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		
		in.close();
		
		int sum = 0;
		
		for(int i = 1; i <= n; i++) {
			sum += i;
		}
		System.out.println(sum);
	}

}