Programming Example

Fibonacci Series in C#

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Fibonacci Series in C#: In case of fibonacci series, next number is the sum of previous two numbers for example 0, 1, 1, 2, 3, 5, 8, 13, 21 etc. The first two numbers of fibonacci series are 0 and 1. Let's see the fibonacci series program in C#.

Program Code

using System;
public class FibonacciExample
{
    public static void Main(string[] args)
    {
        int n1 = 0, n2 = 1, n3, i, number;
        Console.Write("Enter the number of elements: ");
        number = int.Parse(Console.ReadLine());
        Console.Write(n1 + " " + n2 + " "); //printing 0 and 1    
        for (i = 2; i < number; ++i) //loop starts from 2 because 0 and 1 are already printed    
        {
            n3 = n1 + n2;
            Console.Write(n3 + " ");
            n1 = n2;
            n2 = n3;
        }
    }
}

Output

Enter the number of elements: 10
0 1 1 2 3 5 8 13 21 34 Press any key to continue . . .

Explanation

None

How to learn from this program

First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.

Practice suggestion

After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.