CODEWITHSUNDEEP
for-loopmessagebox
Ryan McCloy
Ryan McCloy

Reputation: 25

Output basic compound interest as a list into MessageBox using for loop

I need to output basic compound interest that will be displayed in a message box using for loop

The message box needs to show a left column titled "Years" and a right column showing "Amount".

My code only displays the messagebox 5 times whereas I need it to all be displayed in a list

Here is what I have so far:

  private void button1_Click(object sender, EventArgs e)
    {


        decimal amount;
        decimal principal = 1000;
        double rate = 0.05;
        string msg;
        msg = "Years \t Amount";
        msg += Environment.NewLine;



        for (int year = 1; year <= 5; year++)
        {
            amount = principal * ((decimal)Math.Pow(1.0 + rate, year));
            msg += amount.ToString("C");
            msg  += Environment.NewLine;





        }

        MessageBox.Show(msg, "Compund Interest");

Upvotes: 1

Views: 183

Answers (2)

Gratzy
Gratzy

Reputation: 9389

  private void button1_Click(object sender, EventArgs e)
    {


        decimal amount;
        decimal principal = 1000;
        double rate = 0.05;
        string msg;
        // start building string here i.e. msg = "header \t header"  \t places a tab
        // add a carriage return msg += Enviornment.Newline
        for (int year = 1; year <= 5; year++)
        {
            amount = principal * ((decimal)Math.Pow(1.0 + rate, year));
            // don't overwrite msg but append to it msg += "year number use your counter \t" += what you are already doing below.
            msg = amount.ToString("C");
           // then add your carriage return again.


        }
        MessageBox.Show(msg);
}

Upvotes: 0

Karl Stephen
Karl Stephen

Reputation: 1140

private void button1_Click(object sender, EventArgs e)
{
    string amount = "";
    decimal principal = 1000;
    double rate = 0.05;

    for (int year = 1; year <= 5; year++) {
        amount += string.Format("{0:C}", principal * Convert.ToDecimal(Math.Pow(1.0 + rate, year))) + Environment.NewLine;
    }
    MessageBox.Show(amount, "Compound Inerest");
}

Upvotes: 1

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