﻿ C Sharp - Find n terms of even natural number and their sum

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

## C# Sharp For Loop: Exercise-16 with Solution

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

Visual Presentation:

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
```

Flowchart:

C# Sharp Code Editor: