import java.util.Scanner;

public class NaturalNumberRecursion {

public static int sumNaturalNumber(int n){

if (n == 1)

return 1;

return n + sumNaturalNumber(n - 1); //recursion function calling

}

public static void main(String[] args) {

Scanner s = new Scanner(System.in);

System.out.println("Enter the last limit to sum: ");

int n=s.nextInt();

// NaturalNumberRecursion obj = new NaturalNumberRecursion();

// int result = obj.sumNaturalNumber(n);

//make method static then no need to create obj

int result = sumNaturalNumber(n);

System.out.println("Sum : " + result );

}

}