Powershell Batch Add/Append text to a file name

Question

I am trying to batch add text to the titles of several files in a folder. My code works for command line but not PowerShell:

for %a in (*.avi, *.mta) do ren "%a" "My Title - %a"

Could someone help me adapt this to powershell?

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Basically I would like to perform the following actions:

Folder Contents:

001-episode.avi 002-episode.avi

I would like to add the name of the show to the file

ShowTitle-001-episode.avi ShowTitle-002-episode.ave

Thank you.

Answer 1

Found this to work as well.

Dir | rename-item -newname  { "My Title -" + $_.Name }