Sum of n Natural Numbers in Java

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In this article, we are going to calculate the sum of n natural numbers using Java code.

Contents hide
1 Example
2 Steps to calculate sum of n natural numbers
3 Java Code for Calculating Sum of n Natural Numbers

Example

The sum of n natural numbers is calculated by using the formula n*(n+1)/2.

let assume n=10

n*(n+1)/2 = 10*(10+1)/2 = 10*(11)/2 = 110/2 = 55

Steps to calculate sum of n natural numbers

  • Take input from the user.
  • if n is negative or 0 then the result will be 0.
  • if n is greater than 0 then calculate the sum of n number by using the formula.
  • Print the result.

Java Code for Calculating Sum of n Natural Numbers

import java.util.Scanner;
public class SumOfNaturalNo {

        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            System.out.println("Enter the number");
            int n=sc.nextInt();
            if(n>0) {
                int sum = n*(n+1)/2;
                System.out.println(sum);}
            else {
                System.out.println(0);
            }
        }}
sum of n natural number

We can use the same logic of calculating the sum of n natural numbers in other programming languages like C, C++, Java, etc.

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