[Java] 정올기초다지기 함수3-자가진단03

 

 

package 함수3.자가진단03;
 
import java.util.Scanner;
 
public class Main {
    
    static int sum =0;
    
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        recursive(num);
        sc.close();
    }
    public static void recursive(int num) {
        if(num == 0) {
            System.out.println(sum);
            return;
        }
        else {
            sum += num;
            recursive(num-1);
        }
    }
}