by Data Mining Consultant (1 Submission)
Category: Math/Dates
Compatability: Visual Basic 5.0
Difficulty: Unknown Difficulty
Originally Published: Thu 2nd May 2002
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Algorithm that calculates the Factorial of Numbers (N!) up to 170
VBcoders
On Error GoTo ErrorHandler
'**********************************************************************************************************
'
'Purpose: Algorithm that calculates the Factorial of Numbers (N!) up to 170.
'
'Argument(s): N - long integer number less than 171.
'
'Source: http://www.paretoanalysts.com
'
'Author: Pareto Analysts
'
'Creation Date: December 1, 2001
'
'Description: Calculates the Factorial of a Number. N! can be computed as 'N*(N-1)*(N-2)...(N-(N-1))*2*1
' E.g. 5! = 5*4*3*2*1
'
'Return Value: The Factorial of the Number passed to it.
'
'Return Type: Double
'
'Limitation: The Largest Number that can be passed is 170 corresponding to '170!(7.25741561530799E+306)
'
'
'Warranty : No claim is made as to the accuracy or fitness of this algorithm. The use of this
' algorithm is at your own risk and choice and the author is not liable in anyway
' for its use or damages that may occur as a result of its use.
'
'Copyright: The use or distribution of this algorithm is free provided that it is
' used or distributed along with this header notice and this header notice
' has not been modified in any way. If this algorithm is used in a compiled form then
' the header notice must also be placed in a readme.txt file
'
'Inquiries: Inquiries about this algorithm, data mining, statistical analysis and data analysis
' can be directed to http://www.paretoanalysts.com
'
'*******************************************************************************
If N < 0 Then
Factorial = 0
ElseIf N = 0 Then
Factorial = 1
Else
Factorial = N * Factorial(N - 1)
End If
Exit_ErrorHandler:
Exit Function
ErrorHandler:
MsgBox Err.Number & " " & Err.Description, vbInformation, "www.paretoanalysts.com Factorial "
Resume Exit_ErrorHandler
End Function
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