A simple program to compute the yearly compounded interest on a loan using C# programming language.
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public partial class MainForm : Form
private void btnReset_Click(object sender, EventArgs e)
txtAmount.Text = txtInterestRate.Text = String.Empty;
spnYears.Value = spnYears.Minimum;
private void btnCalc_Click(object sender, EventArgs e)
double interestRate = double.Parse(txtInterestRate.Text);
double amount = double.Parse(txtAmount.Text);
int years = (int)spnYears.Value;
for (int year = 1; year <= years;year++)
interest = amount * interestRate / 100;
amount += interest;
dataGridView1.Rows.Add(year, amount, interest);
catch (Exception ex)
private void MainForm_Load(object sender, EventArgs e)