Excel VBA Replace Text with Two Arrays

Question

I would like to replace the values in column A:A using arrays:

Dim aValueNew() As String
Dim aValueOld() As String

aValueNew = Split("ABC,DEF,GHI", ",")
aValueOld = Split("123,456,789", ",")

123 needs to be replaced by ABC, 456 by DEF and so forth.

What is the most efficient way of doing this? I am struggling on how to include the Replace function in a loop and your help would be appreciated. Something like:

For i = 0 to i = 2
Range("A:A").Replace What:= aValueOld(i), Replacement:=aValueNew(i), LookAt:=xlWhole, SearchOrder:=xlByRows, MatchCase:=False

Answer 1

Try this code:

For i = 0 to UBound(aValueOld)
    Columns("A:A").Select
    Selection.Replace What:= aValueOld(i), Replacement:=aValueNew(i), LookAt:=xlWhole, SearchOrder:=xlByRows, MatchCase:=False

Note:
Your For statement was wrong
If count of values are the bound of array use UBound(<Array Name>)

Answer 2

You almost had it. You may find the documentation for For...Next helpful.

Dim i As Long
For i = 0 To 2
    Range("A:A").Replace What:=aValueOld(i), Replacement:=aValueNew(i), _
        LookAt:=xlWhole, SearchOrder:=xlByRows, MatchCase:=False
Next