/**
 * Created by iyasuwatts on 10/17/17.
 */import java.util.Scanner;
public class Main {

    public static void main(String[] args){
        Scanner number = new Scanner(System.in);
        System.out.println("Please enter a Number:");
        //user input
        int n = number.nextInt();
        //
        int sum= 0;
        
        // loop to add 
        for(int i=0; i<=n; i++){
        sum=sum + i;}
        System.out.println("Sum of all numbers is" +" "+ sum);
        
        
        
        
        
        
    }
}