循环直到资本加倍c＃

Question

I want to create a loop that has a given initial capital and a fixed annual percentage rate (interest) that prints out the current capital for the current year up to and including the year in which the capital has doubled.

for example the initial capital is 3000 and the interest is 12.

//3000*(1 + 12 / 100) = 3360

output
year 1 = 3360
year 2 = 3763.2
year 3 = 4214.78
year 4 = 4720.55
year 5 = 5287,02
year 6 = 5921,46
//end (when the initial capital(3000) has doubled (6000))

what i need help with is to create a loop that will calculate and show the output until the capital has doubled with either a for loop or while loop. the output doesnt have to be like the example but something similar.

here is the code ive created so far:

double initialcapital = 0;
double interest = 0;
int year = 0;
double capital = 0;

Console.Write("Initial capital: ");
initialcapital = int.Parse(Console.ReadLine());

Console.Write("Interest: ");
interest = int.Parse(Console.ReadLine());

capital = initialcapital * (1 + interest / 100);
year = year + 1
Console.Writeline(capital);

Answer 1

 void displayCapital(double initalcapital, double interest){
     int year = 1;
     double capital = initialcapital;

     while(initialcapital > capital / 2) {
         Console.Write("Initial capital: ");
         initialcapital = int.Parse(Console.ReadLine());

         Console.Write("Interest: ");
         interest = int.Parse(Console.ReadLine());

         capital = initialcapital * (1 + interest / 100);
         year = year + 1
         Console.Writeline(capital);
     }
}

just call displayCapital(3000, 12); and you are done

Answer 2

If you want to find the exact number of years before the amount doubles you can use this:

double exactYears = Math.Log(2) / Math.Log((100 + interest) / 100);

Otherwise the following will work for you:

double initialCapital = 0;
double interest = 0;
int year = 0;
double capital = 0;

Console.Write("Initial capital: ");
initialCapital = int.Parse(Console.ReadLine());

Console.Write("Interest: ");
interest = int.Parse(Console.ReadLine());
capital = initialCapital;

while (capital < initialCapital * 2)
{
    capital = capital * (1 + interest / 100);
    year = year + 1;

    Console.WriteLine("Years: " + year);
    Console.WriteLine("Capital: " + capital);
}

Console.WriteLine("Years: " + year);
Console.WriteLine("Capital: " + capital);

double exactYears = Math.Log(2) / Math.Log((100 + interest) / 100);
Console.WriteLine(string.Format("Capital doubled in exactly: {0:0.000} years", exactYears));