What is the setlocal / endlocal equivalent for PowerShell?

Question

Objective

Isolate environmental variable changes to a code block.

Background

If I want to create a batch scrip

Answer 1

Forgive me if I've missed something as there parts of this post I'm a bit unclear on.

I would use the scope modifies $local, $script and $global modifiers.

Example

$env:TEST="EN"
function tt {
  $local:env:TEST="GB"
  ($local:env:TEST)
}

$t = {
  $local:env:TEST="DE"
  ($local:env:TEST)
}

($env:TEST)
tt
($env:TEST)
. $t
($env:TEST)

Output with comments

EN     # ($env:TEST)
GB     # tt
EN     # ($env:TEST)
DE     # . $t
EN     # ($env:TEST)