import java.util.Scanner;

/**
 * Sum of the Numbers
 */
public class Main {
    /**
     * Prompts user to enter an integer. Then calculates the sum of numbers from 1 to entered value.
     */
    public int getNumber(){
        Scanner scanner = new Scanner(System.in);
        
        System.out.println("Enter an integer."); //Prompt
        int input = scanner.nextInt(); //User supplies a value which is assigned to 'input'
        return input;
    }

    public int sumNumbers(int n){
        int x = 0;
        //Loop runs n times
        for (int i = 0; i <= n; i++){
            x += i; //adds current value of x to i and sets that as the new x
        } 
        return x;
    }

    public void solutionBasedOnInput(){
        int answer = sumNumbers(getNumber()); //runs sumNumbers() with the number supplied by the user from getNumber()
        System.out.print(answer); //Prints the solution
    }
}