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Prime Number Function

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Join Date: Nov 2006

Posts: 8

Reputation: geo039 is an unknown quantity at this point

Solved Threads: 0

geo039

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Newbie Poster

Prime Number Function

Nov 2nd, 2006

I'm trying to write a function that checks for prime numbers and returns true if a number is prime. Something simple, i'm just a beginner. Here's what I have, does it make sense..if not any input would be appreciated.

Function IsPrime(ByVal dblCheck AsDouble) AsBoolean
Dim intNumber As Integer
For intNumber = 2 To dblCheck - 1
If dblCheck Mod intNumber = 0 Then
IsPrime = False
Exit Function
End If
Next intNumber
IsPrime = True
'return prime numbers
Return dblCheck
End Function 'IsPrime

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Join Date: Aug 2005

Posts: 5,273

Reputation: iamthwee is a splendid one to behold

Solved Threads: 378

iamthwee

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Posting Expert

Re: Prime Number Function

Nov 2nd, 2006

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Originally Posted by geo039

I'm trying to write a function that checks for prime numbers and returns true if a number is prime. Something simple, i'm just a beginner. Here's what I have, does it make sense..if not any input would be appreciated.

Function IsPrime(ByVal dblCheck AsDouble) AsBoolean
Dim intNumber As Integer
For intNumber = 2 To dblCheck - 1
If dblCheck Mod intNumber = 0 Then
IsPrime = False
Exit Function
End If
Next intNumber
IsPrime = True
'return prime numbers
Return dblCheck
End Function 'IsPrime

Try google prime number algorithms