""Missing argument in parameter list."" when trying to define a list of Site IDs

I have the following as part of a Power-Shell script:=

Connect-ExchangeOnline
$SiteIDs = (64898c8f-2d5f-4e0e-9a9b-eb9828975a9e,20e6140c-0441-4988-b36c-c61cf3400847)

where i am trying to define a list of site IDs, but the above is returning this error:-

PS C:\WINDOWS\system32> $SiteIDs = (64898c8f-2d5f-4e0e-9a9b-eb9828975a9e,20e6140c-0441-4988-b36c-c61cf3400847)
At line:1 char:49
+ $SiteIDs = (64898c8f-2d5f-4e0e-9a9b-eb9828975a9e,20e6140c-0441-4988-b ...
+                                                 ~
Missing argument in parameter list.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : MissingArgument

Any advice?

Thanks

>Solution :

Your SiteIDs should probably be a list of strings. Therefore, you must put them into quotes (and you can omit the parentheses):

$SiteIDs = '64898c8f-2d5f-4e0e-9a9b-eb9828975a9e','20e6140c-0441-4988-b36c-c61cf3400847'