//Programmer: Samantha Alegrid

//Dates (start/end): December 16-16

//Project: Millionaire

//Description: will calculate how many years it will take for a deposited amount of money with a specified interest rate to become a million dollars and

// make the user a millionaire. 

​

​

using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Millionaire" + "\n");

        //How much would you like to invest

        double initial=0;

        do{

            Console.WriteLine("How much would you like to invest? Ensure value is positive.");

            initial = Convert.ToDouble(Console.ReadLine()); 

​

        }while (initial<0); //error check if number is negative

​

        //What is the investement rate

        double inter_rate = 0;

        do{

            Console.WriteLine("What is your interest rate? Ensure value is positive.");

            inter_rate = Convert.ToDouble(Console.ReadLine())/100; //divides the input by 100 

​

        }while (inter_rate<0); //error check if number is negative

​

        //variables 

        double balance = initial; //keeps track of the value of the balance

        double interest = 0; //keeps track of the interest rate amount as money

​

        double years = 0; //intial value of while loop, starting at 0

​

        while (balance <= 1000000){ //stops loop when the balance equals 1000000

            //calculations if no errors occured

            interest = (balance * inter_rate); //calculates the interest amount in dollars

            balance = interest + balance; //calculates the balance for each year

            years++; 

        }

        //displays the years it will take to become a millionare

        Console.WriteLine("\n" + "It will take " +years + " years to become a millionare." );

    }

}