Yearly Compounded Interest in C#

 A simple program to compute the yearly compounded interest on a  loan using C# programming language.

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Program Listing

using System;

using System.Windows.Forms;

namespace CompoundInterestGUI

{

  public partial class MainForm : Form

  {

    public MainForm()

    {

      InitializeComponent();

    }

    private void btnReset_Click(object sender, EventArgs e)

    {

      txtAmount.Text = txtInterestRate.Text = String.Empty;

      spnYears.Value = spnYears.Minimum;

      dataGridView1.Rows.Clear();

    }

    private void btnCalc_Click(object sender, EventArgs e)

    {

      try

      {

        double interestRate = double.Parse(txtInterestRate.Text);

        double amount = double.Parse(txtAmount.Text);

        int years = (int)spnYears.Value;

        double interest;

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

        {

          interest = amount * interestRate / 100;

          amount += interest; 

          dataGridView1.Rows.Add(year, amount, interest);

          

        }

      }

      catch (Exception ex)

      {

        MessageBox.Show(ex.ToString());

      }

    }

    private void MainForm_Load(object sender, EventArgs e)

    {

      txtAmount.Focus();

    }

  }

}