Sub Exist_Feuil()
Dim ws As Object
Dim exist as Boolean
Sheets("Feuil2").Copy Before:=Sheets(1)
For Each ws In Worksheets
If ws.Name = "Recap_Ecart" Then
exist=True
exit for
End if
next ws
if exist then
Activesheet.Name = "Recap_Ecart_2"
Else
Activesheet.Name = "Recap_Ecart"
End If
End Sub