[백준] 8393번 : 합 - java

import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        int sum = 0 ;
 
        for (int i=1; i <= num; i++){
            sum += i;
        }
 
        System.out.print(sum);
    }
}