如何在循环中保存 k 的每个值？

Question

I am trying to create a code that calculates this infinite formula as many times as I want... 3 + 4/(2 3 4) - 4/(4 5 6) + 4/(6 7 8) - 4/(8 9 10) + 4/(10 11 12) - 4/(12 13 14)....

static void Main(string[] args)
{
    double a = 2;
    double b = 3;
    double c = 4;

    double g = 2;
    double t = 3;
    double n = 4;
    int A = 0;

    while (A < 10)
    {
        double d = 4 / (a * b * c);
        double e = -4 / (g * t * n);
        double k = d + e;

        if (A % 2 == 0)
        {

            g += 2;
            t += 2;
            n += 2;
            A++;
        }
        else if (A % 2 == 1)
        {
            a += 2;
            b += 2;
            c += 2;
            A++;
            Console.WriteLine(k);
            
            //3.1415926
        }
    }
}

Answer 1

To save your values of k to a file, you can use a StreamWriter instead of Console.

static void Main(string[] args)
{
    using StreamWriter writer = File.CreateText("output.txt");

    // ...

    writer.WriteLine(k);
}