C#: Display the sum of n number of odd natural number

Last update on December 20 2024 12:41:51 (UTC/GMT +8 hours)

Write a C# Sharp program to display the n terms of odd natural numbers and their sums.
like: 1 3 5 7 ... n

Visual Presentation:

Sample Solution:

C# Sharp Code:

using System;  // Importing necessary namespace

public class Exercise8  // Declaration of the Exercise8 class
{  
    public static void Main()  // Main method, entry point of the program
    {
        int i, n, sum = 0;  // Declaration of variables 'i' for iteration, 'n' to store the input number of terms, 'sum' to calculate the sum

        Console.Write("\n\n");  // Displaying new lines
        Console.Write("Display the sum of n odd natural numbers:\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 entered by the user

        Console.Write("\nThe odd numbers are :");  // Displaying the start of the sequence of odd numbers

        for (i = 1; i <= n; i++)  // Loop to generate 'n' odd natural numbers
        {
            Console.Write("{0} ", 2 * i - 1);  // Displaying each odd number in the sequence
            sum += 2 * i - 1;  // Calculating the sum by adding each odd number
        }

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

Sample Output:

Display the sum of n odd natural number:                                                                      
------------------------------------------                                                                    
                                                                                                              
Input number of terms : 5                                                                                     
                                                                                                              
The odd numbers are :1 3 5 7 9                                                                                
The Sum of odd Natural Number upto 5 terms : 25 

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