2025. N줄덧셈

SW Expert 2025.N줄덧셈

* 문제의 저작권은 SW Expert에 있습니다 

import java.util.Scanner;
 
public class Solution {
 
    public static void main(String[] args) {
        int num = (new Scanner(System.in).nextInt());
        int sum = 0;
        if(num<10000) {
            for (int i = 1; i <= num; i++) {
                sum = sum + i;
            }
            System.out.println(sum);
        }
 
    }
 
}