For programmers and developers, Fibonacci series is a common term that everyone learns with basics. To recall, Fibonacci series C# is a series of numbers wherein every number is a sum of the previous two. Starting with 0 and 1, the sequence is as 0, 1, 1, 2, 3, 5, 8, and so on.

General Expression and Program for Fibonacci Series C#

Written as a rule, the expression of Fibonacci series is Xn = Xn-1 + Xn-2. For clarification, below given is a program for the Fibonacci series C#.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace FibonaciDemo
    class Program
        static void Main(string[] args)
            int i, count, f1 = 0, f2 = 1, f3 = 0;
            Console.Write("Enter the Limit : ");
            count = int.Parse(Console.ReadLine());
            for (i = 0; i <= count; i++)
                f3 = f1 + f2;
                f1 = f2;
                f2 = f3;


Did you face any difficulty understanding the Fibonacci series C#, its expression, and code?  Share your comments and concerns in the below comment section.

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