Compound Interest Calculation?

Feb 6, 2011

Im a little stuck with the Compound Interest Formula.

My code returns
0.00 :L
Dim amount, interest, monthly As Double



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Dec 5, 2011

I have to create a Compound Interest Loop where I input a Mortgage amount and Mortgage Term (ie how many years the mortgage will span into another.) into two textboxes.

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I'm experimenting with linq compount selects. I find the following query not to return any element:

Dim q = From s In d.GetChildRows("DossierSinistri") _
From i In s.GetChildRows("DossierIncarichi") _
Select s


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May 8, 2008

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dim lblDT...etc...

Here is where I create the compound key, and it seems fine.
lblDT.PrimaryKey = New DataColumn() {
lblDT.Columns("serialno"), _

This is where I am trying to create an object to pass to the .find
dim objSearch As New Object() {10643, 28}
It if would work this is how the find would be.
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Apr 2, 2012

EDIT: was a design issueI am undergoing a computing project for Alevel computing.The project consists of a 6 tabled Microsoft access database. I am using to code the application for a student tracking system.My ERD is below:My problem: How to insert a new compound Primary key into a existing table?If I increment StudID and CourseID in tblContact then I need to increment them in tblStudentCourse which leads to records not pointing to the right directions..For enforcing the relationships I am using the .relations with the dataset.

'Student - StudentCourse
DS.Relations.Add(New DataRelation("StudStudCorRelation", DTStudents.Columns("StudID"), DTStudentCourses.Columns("StudID"), True))


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Mar 26, 2012

I need to modify this code to add 1% interest rate to the new and used rates when less than a 20% down payment is made.

Public Class Form1
' Class-level constants
Const dblMONTHS_YEAR As Double = 12 ' Months per year


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Jul 27, 2009

I,ve completed a program for a debt solution agency that calculates the amount a client can afford to repay after all his deductions and general life costs, my proplam however is at the end when i have to display all the creditors on a proposal data grid that shows the amount and total months to repay all creditors and calculates the amounts as one of the creditors debt is paid up and that monthly installment is devided between the remaining creditors.

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Mar 26, 2012

I need to modify this code to add 1% interest rate to the new and used rates when less than a 20% down payment is made.

I've already added in the constants for the increased interest rate, but hit a wall there.

Public Class Form1
' Class-level constants
Const dblMONTHS_YEAR As Double = 12 ' Months per year


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Feb 19, 2010

I am trying to program that is based on calculating the loan based on the balance of an item after the deposit. Then I must display certain information in a listbox. I am having a problem

Dim buyername As String
Dim cartype As String


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Mar 22, 2009

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Mar 11, 2011

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Public Class InterestCalculatorForm
' handles Calculate Button's Click event
Private Sub calculateButton_Click(ByVal sender As System.Object, _


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Apr 13, 2009

I have successfully written this interest calculation, although it is based on the ppmt function and adding up the interest from each payment. This is quite a long looping process.. And it is not accurate because of the rounding of each payment. I was wondering if someone knows if there is a formula I can use, or if the pmt function is capable of this? (e.g. Mortgage payment - total interest payable over 30 years at 5% ( principle and interest repayments))?

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Feb 14, 2012

I am working on a program that takes a present value, multiplies it by an interest rate (between 1 and 25 percent), multiplies the resultant answer by a specified number of periods and produces a listbox breakdown of value accumulation for each period. I was doing just fine. UNTIL. yeah, until......I don't really know when...... I am trying to specify that the interest rate must be between .01 and .25 (user has to enter it as a decimal on the GUI) or a Message Error box pops up. However, it seems that everywhere I drop my code, it doesn'
Private Sub mnuClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuClear.Click


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Jul 6, 2009

I am writing this program for class its supposed to be able to accept loan amount interest rate amount and the term of the loan (in years) and then output how much interest you owe and how much in total you owe.

Here is my code:
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
Inherits System.Windows.Forms.Form
'Declare Variables
Dim loanAmount As Double
Dim interestRate As Double
[Code] .....

I copied the whole code as to I do not know where the rros are. My error keeps saying 'class' statement must end with a matching 'end class' I got a feeling this is something like if/endif but I cannot find it.

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Feb 18, 2009

Hi how's it going. In the middle of coding a banking application for a project. Part of it involves mortgage interest repayments. Was wondering if there was any way of logging the time a new record was created and added to the database and then adding interest to the balance owed periodically every 30 days..

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Feb 8, 2008

I need to code this with 20% down payment 2.5% closing costcash required to close the loan Principal and interest can be computed by call the PMT function, terms 30 years (360 months 2.5% Property tax 0.8% insurance monthly payment is equal to the sum of the principal and interest, property tax and insurance.

I have attached my project.

I am not getting any input from my teacher and the book does not say much about this

Attached File(s)

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Mar 9, 2009

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Sep 12, 2010

Ihave datagridview, wich have 5 columns


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1 a 15
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May 8, 2011

i have an issue with my program. when i create a function and use a calculation in it it returns a wrong answer. if i copy the calculation and put it directly in the btnClick event it works ok. is this normal?

here is the code if you would like to try see what i am doing wrong.
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click


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Aug 21, 2010

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Here's the code for the calculation and the click button:


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Jan 5, 2011

I have two money fields in a SQL database called TotalClaimed and PartialSettlementAmountRecd.They are declared as Decimals like so:

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Public TotalClaimed As Decimal

They both output the repsective amounts perfectly. I need to do a calculation on them, by subtracting PartialSettlementAmountRecd from TotalClaimed. I have tried the following, but it just outputs a random number, not the amount I require.

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Mar 15, 2012

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Below is my code:

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I have an array of characters. Depending on the number selected (between 1 and 30), the program selects random characters and concatonates them into a string. Kind of like how I think a password generator would work.I want to update a progress bar to show how the operation is going, but I need to reserve 20% of the progress bar for some actions before this, and the last 10% for the actions that follow it. So there is 70% available to use. My question is:If I set the progress bar to 20% and do the following math: 70/NumOfChars, then use a for loop to add the result of this to the progress bar (pb+=result), why does the total progress NOT EQUAL 90%!

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Sep 11, 2011

I'm trying to work on code where I enter number of hours into a textbox (txtHours) and then EITHER you press a button (cmdPay) and then the income for the week is calculated and shows up in a second text box (txtPay) OR txtPay does the calculation itself, everytime a number is typed into txtHours.

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cnthours = CDbl(txtHours.Text)


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Apr 7, 2011

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I have tried iterating through each element in the 2d array and running the calculation. If the calculated result is smaller than the currently stored minimum I set that to the minimum.

This works but it runs so slowly it makes the solution a non starter. It performs each calculation quickly but because of the number of elements in the array the calculation for the whole array is stupidly long.

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The program loads the csv and copies the data into an array as such:

ReDim strarray(num_rows, num_cols)
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I have a Grid With Text Item Templates to insert data from Grid to Database.I have to make some formula on runtime with out postback the page Can i do this My code is bellow.

For Each gvRow2 As GridViewRow In GridView1.Rows
Dim txtNetWt As TextBox = CType(gvRow2.FindControl("txtNetWt"), TextBox)
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