Sum of n natural numbers in java

 Question 1)

Write a Program to find the summation of n numbers.

Answer :-

                import java.util.Scanner;

public class SummationOfNNumbersFormula {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        // Prompt the user to enter the number of elements

        System.out.print("Enter the number of elements: ");

        int n = scanner.nextInt();

        // Prompt the user to enter the numbers

        System.out.println("Enter the elements:");

        int sum = 0;

        for (int i = 1; i <= n; i++) {

            int num = scanner.nextInt();

            sum += num;

        }

        // Calculate the summation using the formula

        int summation = n * (n + 1) / 2;

        // Display the summation

        System.out.println("Sum of the numbers: " + summation);

        scanner.close();

    }

}