문제풀이 27번

입력된 n부터m 까지의 합을 구하시오
1 4 답 1+2+3+4 =10

package _2;
import java.util.*;

public class Main {
	

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int m = sc.nextInt();
		
		
		System.out.print(sum(n,m));
		


	   
	  }
	
	public static int sum(int n ,int m) {
		if(n==m) return m;
		else		
				return n+sum(n+1,m);
			
		
	}
}