Tuesday, December 2, 2008

Convert Number To Words

Option Explicit

' Function for conversion of a Currency to words
' Parameter - accept a Currency
' Returns the number in words format
'*************************************************

Function CurrencyToWord(ByVal MyNumber)
Dim Temp
Dim Rupees, Paisa As String
Dim DecimalPlace, iCount
Dim Hundreds, Words As String
ReDim Place(9) As String
Place(0) = " Thousand "
Place(2) = " Lakh "
Place(4) = " Crore "
Place(6) = " Arab "
Place(8) = " Kharab "
On Error Resume Next
' Convert MyNumber to a string, trimming extra spaces.
MyNumber = Trim(Str(MyNumber))

' Find decimal place.
DecimalPlace = InStr(MyNumber, ".")

' If we find decimal place...
If DecimalPlace > 0 Then
' Convert Paisa
Temp = Left(Mid(MyNumber, DecimalPlace + 1) & "00", 2)
Paisa = " and " & ConvertTens(Temp) & " Paisa"

' Strip off paisa from remainder to convert.
MyNumber = Trim(Left(MyNumber, DecimalPlace - 1))
End If

' Convert last 3 digits of MyNumber to ruppees in word.
Hundreds = ConvertHundreds(Right(MyNumber, 3))
' Strip off last three digits
MyNumber = Left(MyNumber, Len(MyNumber) - 3)

iCount = 0
Do While MyNumber <> ""
'Strip last two digits
Temp = Right(MyNumber, 2)
If Len(MyNumber) = 1 Then
Words = ConvertDigit(Temp) & Place(iCount) & Words
MyNumber = Left(MyNumber, Len(MyNumber) - 1)

Else
Words = ConvertTens(Temp) & Place(iCount) & Words
MyNumber = Left(MyNumber, Len(MyNumber) - 2)
End If
iCount = iCount + 2
Loop

CurrencyToWord = "Rupees " & Words & Hundreds & Paisa
End Function

' Conversion for hundreds
'*****************************************
Private Function ConvertHundreds(ByVal MyNumber)
Dim Result As String

' Exit if there is nothing to convert.
If Val(MyNumber) = 0 Then Exit Function

' Append leading zeros to number.
MyNumber = Right("000" & MyNumber, 3)

' Do we have a hundreds place digit to convert?
If Left(MyNumber, 1) <> "0" Then
Result = ConvertDigit(Left(MyNumber, 1)) & " Hundreds "
End If

' Do we have a tens place digit to convert?
If Mid(MyNumber, 2, 1) <> "0" Then
Result = Result & ConvertTens(Mid(MyNumber, 2))
Else
' If not, then convert the ones place digit.
Result = Result & ConvertDigit(Mid(MyNumber, 3))
End If

ConvertHundreds = Trim(Result)
End Function

' Conversion for tens
'*****************************************
Private Function ConvertTens(ByVal MyTens)
Dim Result As String

' Is value between 10 and 19?
If Val(Left(MyTens, 1)) = 1 Then
Select Case Val(MyTens)
Case 10: Result = "Ten"
Case 11: Result = "Eleven"
Case 12: Result = "Twelve"
Case 13: Result = "Thirteen"
Case 14: Result = "Fourteen"
Case 15: Result = "Fifteen"
Case 16: Result = "Sixteen"
Case 17: Result = "Seventeen"
Case 18: Result = "Eighteen"
Case 19: Result = "Nineteen"
Case Else
End Select
Else
' .. otherwise it's between 20 and 99.
Select Case Val(Left(MyTens, 1))
Case 2: Result = "Twenty "
Case 3: Result = "Thirty "
Case 4: Result = "Forty "
Case 5: Result = "Fifty "
Case 6: Result = "Sixty "
Case 7: Result = "Seventy "
Case 8: Result = "Eighty "
Case 9: Result = "Ninety "
Case Else
End Select

' Convert ones place digit.
Result = Result & ConvertDigit(Right(MyTens, 1))
End If

ConvertTens = Result
End Function

Private Function ConvertDigit(ByVal MyDigit)
Select Case Val(MyDigit)
Case 1: ConvertDigit = "One"
Case 2: ConvertDigit = "Two"
Case 3: ConvertDigit = "Three"
Case 4: ConvertDigit = "Four"
Case 5: ConvertDigit = "Five"
Case 6: ConvertDigit = "Six"
Case 7: ConvertDigit = "Seven"
Case 8: ConvertDigit = "Eight"
Case 9: ConvertDigit = "Nine"
Case Else: ConvertDigit = ""
End Select
End Function