Check if value exists in column in VBA

try this:

If Application.WorksheetFunction.CountIf(RangeToSearchIn, ValueToSearchFor) = 0 Then
Debug.Print "none"
End If

If you want to do this without VBA, you can use a combination of IF, ISERROR, and MATCH.

So if all values are in column A, enter this formula in column B:

=IF(ISERROR(MATCH(12345,A:A,0)),"Not Found","Value found on row " & MATCH(12345,A:A,0))

This will look for the value "12345" (which can also be a cell reference). If the value isn't found, MATCH returns "#N/A" and ISERROR tries to catch that.

If you want to use VBA, the quickest way is to use a FOR loop:

Sub FindMatchingValue()
    Dim i as Integer, intValueToFind as integer
    intValueToFind = 12345
    For i = 1 to 500    ' Revise the 500 to include all of your values
        If Cells(i,1).Value = intValueToFind then 
            MsgBox("Found value on row " & i)
            Exit Sub
        End If
    Next i

    ' This MsgBox will only show if the loop completes with no success
    MsgBox("Value not found in the range!")  
End Sub

You can use Worksheet Functions in VBA, but they're picky and sometimes throw nonsensical errors. The FOR loop is pretty foolproof.

The find method of a range is faster than using a for loop to loop through all the cells manually.

here is an example of using the find method in vba

Sub Find_First()
Dim FindString As String
Dim Rng As Range
FindString = InputBox("Enter a Search value")
If Trim(FindString) <> "" Then
    With Sheets("Sheet1").Range("A:A") 'searches all of column A
        Set Rng = .Find(What:=FindString, _
                        After:=.Cells(.Cells.Count), _
                        LookIn:=xlValues, _
                        LookAt:=xlWhole, _
                        SearchOrder:=xlByRows, _
                        SearchDirection:=xlNext, _
                        MatchCase:=False)
        If Not Rng Is Nothing Then
            Application.Goto Rng, True 'value found
        Else
            MsgBox "Nothing found" 'value not found
        End If
    End With
End If
End Sub

Simplest is to use Match

If Not IsError(Application.Match(ValueToSearchFor, RangeToSearchIn, 0)) Then
    ' String is in range