[백준/단계별로 풀어보기] 3. for문 - 8393.합 (Java8)

 문제 

 풀이 

package step3;

import java.util.Scanner;

public class Main {

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

}

 출처 

8393번: 합