C#: Calculate n terms of even natural number and their sum

Last update on December 20 2024 12:49:53 (UTC/GMT +8 hours)

Write a program in C# Sharp to display the n terms of even natural number and their sum.

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Sample Solution:

C# Sharp Code:

using System;  // Importing necessary namespace

public class Exercise16  // Declaration of the Exercise16 class
{  
    public static void Main()  // Main method, entry point of the program
    {
        int i, n, sum = 0;  // Declaration of variables 'i' for iteration, 'n' for the number of terms, 'sum' to store the sum

        Console.Write("\n\n");  // Displaying new lines
        Console.Write("Calculate n terms of even natural number and their sum:\n");  // Displaying the purpose of the program
        Console.Write("---------------------------------------------------------");  // Displaying a separator
        Console.Write("\n\n");

        Console.Write("Input number of terms : ");  // Prompting the user to input the number of terms
        n = Convert.ToInt32(Console.ReadLine());  // Reading the number of terms entered by the user 

        Console.Write("\nThe even numbers are :");  // Displaying a message for even numbers
        for (i = 1; i <= n; i++)  // Loop to calculate even numbers and their sum
        {
            Console.Write("{0} ", 2 * i);  // Displaying the even number in the sequence
            sum += 2 * i;  // Adding the even number to the sum
        }

        Console.Write("\nThe Sum of even Natural Number up to {0} terms : {1} \n", n, sum);  // Displaying the sum of even natural numbers
    }
}

Sample Output:

Calculate n terms of even natural number and their sum:                                                                                                        
---------------------------------------------------------                      
Input number of terms : 10                                                                                                                     
The even numbers are :2 4 6 8 10 12 14 16 18 20                                                                                                                
The Sum of even Natural Number upto 10 terms : 110 

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