Hellp

I keep getting an error messege that says :

Conversion from string "" to type "integer" is not valid?!?!!?

what should i do?? what am i doing wrong?




Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculate.Click

Dim thenumber, theterms, z As Integer
Dim thesum As Decimal


thenumber = CInt(number.Text)
theterms = CInt(terms.Text)
thesum = CDec(sum.Text)

theterms = 1
thesum = 0


Do Until thesum > thenumber
z = 1 / theterms
thesum = z
Exit Do
z = z + z
theterms = theterms + 1

Loop

terms.Text = CStr(theterms)
sum.Text = CStr(thesum)





End Sub
End Class

Quote:

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Dim thenumber, theterms, z As Integer

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This is an incorrect way of dimming

Try this

VB Code:

Dim thenumber As Integer, theterms As Integer, z As Integer

Exactly! You get that error because thenumber and theterms are declared as variants.
Do what koolsid suggested.

i changed it around a little bit, but same problem...i get that messege



Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculate.Click

Dim thenumber As Integer
Dim theterms As Integer
Dim z As Integer
Dim n As Integer
Dim thesum As Decimal


thenumber = CInt(number.Text)
theterms = CInt(terms.Text)
thesum = CDec(sum.Text)

theterms = 1
thesum = 0
z = 1 / n
n = 1



Do While thesum < thenumber
thesum = z
z = z + z
n = n + 1

Loop



terms.Text = CStr(theterms)
sum.Text = CStr(thesum)

The sum of the series 1/1 +1/2 +1/3.... never converges. Thus if you add enough terms you can reach any value/ For example it takes 4 terms of the series to reach 2 as 1 + 1/2 +1/3 +1/4 is 2.0833333 and 11 terms to reach 3.

AM i writing this program right???

I think this should be move to VB.Net however, why are you using integers? Try using double.

Quote:

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theterms = 1
thesum = 0
z = 1 / n
n = 1

---

Have you declared the value of 'n' elsewhere before 'z = 1 / n'?

He's doubleposting the same topic! I suggest to reply only on the other one!
The other post

Quote:

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He's doubleposting the same topic!

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lol...

Sorry I must have missed the other post.

@cthompson86: Please do not make duplicate threads. You will end up confusing yourself and others too... besides it is not allowed ;)