C output Fibonacci sequence

One 、 What is Fibonacci series

Fibonacci sequence （Fibonacci sequence）, Also called golden section series 、 Because mathematician Leonardo · Fibonacci （Leonardoda Fibonacci） Take rabbit breeding as an example , It is also called “ Rabbit Series ”

Two 、 Fibonacci sequence definition ：

Simply speaking , Fibonacci sequence refers to a sequence like this 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89…
That is, the sequence from the first 3 A start , Each of these terms is equal to the sum of the first two terms .

3、 ... and 、 Use C# Realization of Fibonacci series

When we fully understand the definition of Fibonacci sequence , Then it can be implemented in programming language （ Sample selection C# Realize the output Fibonacci sequence , And press 5 That's ok 4 Column mode output ）

using System;

namespace fibonacci
{
    
    class Program
    {
    
        static void Main(string[] args)
        {
    
            int a = 1;
            int b = 1;
            int c = 0;
            Console.WriteLine(" Fibonacci sequence ：");
            for(int i=1; i<=5; i++)
            {
    
                for (int j=1; j<= 4; j++)
                {
    
                    Console.Write("{0}\t", a);
                    c = a + b;
                    a = b;
                    b = c;
                }
                Console.WriteLine();
            }
            Console.ReadKey();
        }
    }
}