looping problems??? (help)

How do I change both For...Next statements to Do...Loop statements.


'declare variables
Dim term As Integer
Dim principal, rate, payment As Double

Try
'assign input to a variable
principal = Double.Parse(Me.uiPrincipalTextBox.Text)

'display the years in the heading
Me.uiPaymentLabel.Text = " 3 yrs 4 yrs 5 yrs" _
& ControlChars.NewLine

'calculate and display the monthly payments, using
'rates of 5% to 10% and terms of 3 to 5 years
For rate = 0.05 To 0.1 Step 0.01
'display the current rate
Me.uiPaymentLabel.Text = Me.uiPaymentLabel.Text & rate.ToString("P0") _
& " "
For term = 3 To 5
payment = -Financial.Pmt(rate / 12, term * 12, principal)
Me.uiPaymentLabel.Text = Me.uiPaymentLabel.Text _
& payment.ToString("N2") & " "
Next term
Me.uiPaymentLabel.Text = Me.uiPaymentLabel.Text & ControlChars.NewLine
Next rate


Any Help would be greatly appreciated.

Think about what you want to happen. A Do loop does something either While something is True or Until it is True. You can test that condition either before you Do something or after. You simply need to ask yourself these questions:

What do I want to Do?
Do I want to do it While something is True or Until something is True?
Do I need to test this condition before doing something or after?

I have to say, if you need to change a working For loop to a Do loop then this must be homework, so for us to just provide code is unethical. The fact that you're using "ui" as a prefix is more evidence of this because I've never seen anyone but students use that. Your user name kind of gives it away too. I suggest that you answer those questions for yourself and see where that leads you. Try writing some code and post back if it doesn't work.

VB Code:

rate=0.05
Do Until rate>0.1
   'display the current rate
   Me.uiPaymentLabel.Text = Me.uiPaymentLabel.Text & rate.ToString("P0") & " "
   term=3
   Do Until term>5
      payment = -Financial.Pmt(rate / 12, term * 12, principal)
      Me.uiPaymentLabel.Text = Me.uiPaymentLabel.Text _
      & payment.ToString("N2") & " "
      term+=1
   Loop
   Me.uiPaymentLabel.Text = Me.uiPaymentLabel.Text & ControlChars.NewLine
   rate+=0.01
Loop

And does it look bad when I use [Highlight=VB] tag?

Ugh, code tags suck man. It formats it so you can like read and everything. Dude they're a total waste of time.

As a side note he(/she?) also posted this in the classic VB forum and people have already given him the answer, myself included (hey it was 2:30AM, I wasn't thinking!).