Help me guys,Visual basic newbie here!!T_T?

[Sabrik]

This is my last option after tryin so many times..
Question 1

When $1000 is deposited at 5 percent simple interest, the amount grows by $50 each year.
When money is invested at 5 percent compound interest, then the amount at the end of each
year is 1.05 times the amount at the beginning of that year. Write a program to display the
amounts for 10 years for a $1000 deposit at 5 percent simple and compound interest. The
first few lines displayed in the list box should appear as in figure below.

here is some of the program i've been workin out..
actually i dont know the formula...help me please!!
Private Sub Command1_Click()
Dim n As Integer
Dim count As Integer
Dim Deposit As Integer
Dim calcDeposit As Double
Dim calcDeposit2 As Double

count = 0
calcDeposit = 0
calcDeposit2 = 0

Deposit = Val(Text1.Text)

For n = 1 To 10
calcDeposit = Deposit + (50 * n)//calculating simple interest<---------Ok!!
calcDeposit2 = Deposit * (1 + 1.05)//calculating compund interest<-------here is the problem,KO!!
count = count + 1

List1.AddItem count & vbCrLf
List2.AddItem calcDeposit & vbCrLf
List3.AddItem calcDeposit2 & vbCrLf
Next n

End Sub

 

[husoski]

The original amount is 1000.0
After 1 year, the amoutn will be 1000.0 * 1.05
After 2 years, it will be 1000.0 * 1.05 * 1.05
... and so on.

That's what "the amount at the end of each year is 1.05 times the amount at the beginning of that year" means. You can perform this calculation with a loop (oddly enough, this may be the most accurate way) or by generalizing the pattern above:

After n years, the amount will be 1000.0 * (1.05 ^ n).

Since you need to generate a table of value for n=1 to 10, you probably won't need the exponential formula, but you should know that it is there.

Question: Why do you have the count variable? Isn't it the same as n on each iteration of the for/next loop?

Anyway, outside the loop, start calcDeposit2 as 1000.0, not 0. And inside:

calcDeposit2 = calcDeposit2 * 1.05

Do the same with calcDeposit, only add 50 inside the loop instead of multiplying by 1.05.

Good luck!