Turn simple powershell into a script

Question

I have quite a few libraries that share the same column names and all need to be given default values.
Rather than doing this by hand in the GUI I am turning to PS.
I have few lines of PS (see below) and this works fine but I don't want to have to keep typing pasting so have decided I need to turn it into a script and pass three arguments to it so I can keep calling the script with different values.
Can someone advise the correct syntax to transform these lines into UpdateColumns.ps1 and then how I would call it and pass threee arguments please.
I have replaced the hard coded values with $VAR1, $VAR2 and $VAR3 to show what I need to use as arguments.
$site = Get-SPWeb http://server/site/sub
$list = $web.Lists[$VAR1]
$Field = $List.Fields[$VAR2]
$Field.DefaultValue = $VAR3
$Field.Update()
$List.Update()
$web.Dispose()

Answer 1

That error would be from one of these two lines:
$list = $web.Lists[$var1]
$Field = $List.Fields[$var2]
So either you don't have a list named "comms" or a column named "function". The display name of the column and the "internal name" of the column may be different. To find the internal name go to the list's settings page, scroll down to the columns section
and click the "function" column. Inspect the URL of that page looking for &Field= and use the name listed there.
Mike Smith TechTrainingNotes.blogspot.com
Books:
SharePoint 2007 2010 Customization for the Site Owner,
SharePoint 2010 Security for the Site Owner