Fibonacci C# for while do while loop. Calculate Fibonacci Series in Various Ways Using C#

Fibonacci C# for loop

C# 2016

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace demo
{
    class Program
    {

        public static int functionDemo(int n)
        {
            if((n==0 ) || (n ==1)){
                return n;
            }
            else
            {
                return functionDemo(n - 1) + functionDemo(n - 2);
            }
        }
        static void Main(string[] args)
        {
            for (int i = 0; i < 15; i++ )
            {
                Console.WriteLine(functionDemo(i));
            }
            Console.Read();
        }
    }

}

Fibonacci C# for loop

C# 2016

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace demo
{

    class Program
    {
        public static int Fibonacci(int n)
        {
            int a = 0;
            int b = 1;
            // In N steps compute Fibonacci sequence iteratively.
            for (int i = 0; i < n; i++)
            {
                int temp = a;
                a = b;
                b = temp + b;
            }
            return a;
        }

        static void Main()
        {
            for (int i = 0; i < 15; i++)
            {
                Console.WriteLine(Fibonacci(i));
            }
            Console.Read();
        }
    }
}

Fibonacci C# for loop

C# 2016

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace demo
{

    class Program
    {

        static void Main()
        {
            for (int a = 0, b = 1; a < 400; a = a + b, b = a - b)
            {
                Console.WriteLine(a + " ");
            }
            Console.Read();
        }
    }
}

Fibonacci C# while loop

C# 2016

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace demo
{

    class Program
    {

        public static void change(int a, int b)
        {

            while (a <= 300)
            {
                a = b + a;
                b = a - b;
                Console.WriteLine(a);
            }
            Console.Read();
        }
        static void Main()
        {
            change(0, 1);

        }
    }
}

Fibonacci C# do while loop

C# 2016

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace demo
{

    class Program
    {

        public static void change(int a, int b)
        {

            do{
                a = b + a;
                b = a - b;
                Console.WriteLine(a);
            } while (a <= 300) ;

            Console.Read();
        }
        static void Main()
        {
            change(0, 1);

        }
    }
}

Fibonacci C# do while loop

C# 2016

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace demo
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 0, b = 1, sum = 1;
            while (a < 150)
            {
                sum = a + b;
                a = b;
                b = sum;
                Console.WriteLine(sum);
            }
            Console.Read();
        }
    }

}