[백준 알고리즘 ] 8393번 (java)

합 구하기

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