//Programmer: Muhammad

//Dates: Wednesday April 9 2025

//Project: U6A2: Freedom Financial Calculator

//Description: // This program calculates and displays an amortization table for an investment over time.

// It takes user input for principal, interest rate, and term, then shows yearly interest and balance.

​

using System;

class FreedomFinancialCalculator

{

    static void Main()

    {

        // Welcome message

        Console.WriteLine("Welcome to Freedom 55 Investments");

​

        // -------------------------------

        // Input Section with Validation

        // -------------------------------

        double principal = GetPositiveDouble("Principal Invested ($): ");

        double ratePercent = GetPositiveDouble("Interest Rate of Fund (%): ");

        int termYears = GetPositiveInt("Term of Investment (years): ");

​

        // Convert interest rate to decimal (e.g., 6% -> 0.06)

        double rate = ratePercent / 100;

​

        // -------------------------------

        // Processing & Output Section

        // -------------------------------

        double balance = principal;

​

        Console.WriteLine("\nYear\tInterest\tBalance");

        Console.WriteLine("--------------------------------------------------");

​

        for (int year = 1; year <= termYears; year++)

        {

            // Calculate interest for the year

            double interest = balance * rate;

​

            // Add interest to the balance

            balance += interest;

​

            // Display the year, interest, and new balance (formatted to 2 decimal places)

            Console.WriteLine($"{year}\t${interest:F2}\t\t${balance:F2}");

        }

​

        // Optional: keep console open (if running in certain IDEs)

        // Console.ReadLine();

    }

​

    // ---------------------------------------------

    // Method to get a valid positive double value

    // ---------------------------------------------

    static double GetPositiveDouble(string prompt)

    {

        double value;

        while (true)

        {

            Console.Write(prompt);

            if (double.TryParse(Console.ReadLine(), out value) && value > 0)

                return value;

            else

                Console.WriteLine("Invalid input. Please enter a positive number.");

        }

    }

​

    // ---------------------------------------------

    // Method to get a valid positive integer value

    // ---------------------------------------------

    static int GetPositiveInt(string prompt)

    {

        int value;

        while (true)

        {

            Console.Write(prompt);

            if (int.TryParse(Console.ReadLine(), out value) && value > 0)

                return value;

            else

                Console.WriteLine("Invalid input. Please enter a positive whole number.");

        }

    }

}

​