C# Program to Calculate Sum of Natural Numbers.

Calculating the sum of natural numbers is a fundamental problem in programming. It involves adding up numbers from 1 to a given positive integer. In this article, we will walk through the process of solving this problem using C# and provide a detailed step-by-step guide.

Problem Statement: Write a C# program to calculate the sum of natural numbers up to a given positive integer n.

Example:

Input: n = 5
Output: 15

Explanation:
The sum of Natural Number from 1 to 5 is 15.

Steps to Find Sum of Natural Numbers.

Below are the steps that you need to follow to solve this problem:

Step 1: Take an integer n as input, which represents the upper limit of the natural numbers.

Step 2: Declare a variable sum and set it to 0. This variable will be used to store the sum of the natural numbers.

Step 3: Use a for loop to iterate through numbers from 1 to n.

Step 4: In each iteration of the loop, add the current number to the sum variable.

Step 5: After the loop completes, output the value of the sum variable as the sum of natural numbers from 1 to n.

C# Code to Find Sum of Natural Numbers Using Loop.

// C# code to find the sum of natural numbers
using System;

namespace SumOfNaturalNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter a positive integer: ");
            int n = Convert.ToInt32(Console.ReadLine());

            int sum = 0;
            for (int i = 1; i <= n; i++)
            {
                sum += i;
            }

            Console.WriteLine($"Sum of natural numbers from 1 to {n} is {sum}");
        }
    }
}

Output:

Enter a positive integer: 6
Sum of natural numbers from 1 to 6 is 21

C# Code to Find Sum Natural Number Using Formula.

We can also find the sum of n natural numbers using the formula sum = n * (n + 1) / 2.

// C# code to find the sum of natural numbers
using System;

namespace SumOfNaturalNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter a positive integer: ");
            int n = Convert.ToInt32(Console.ReadLine());

            int sum = 0;
            //formula to calculate sum of natural numbers
            sum = n * (n + 1) / 2;

            Console.WriteLine($"Sum of natural numbers from 1 to {n} is {sum}");
        }
    }
}

Output:

Enter a positive integer: 5
Sum of natural numbers from 1 to 5 is 15

Similar articles:

C# Program to Calculate Sum of Natural Numbers.

Steps to Find Sum of Natural Numbers.

C# Code to Find Sum of Natural Numbers Using Loop.

C# Code to Find Sum Natural Number Using Formula.

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