testIfSupportingClosure.ps1

$givenValue = 10

function testIfSupportingClosure(){
    $givenValue = 4
    {
        $givenValue = $givenValue + 1
        echo "The givenValue is ${givenValue}."
    }
}

$closureA = testIfSupportingClosure
$closureA.invoke() # The givenValue is 11.
$closureA.invoke() # The givenValue is 11.

$closureB = testIfSupportingClosure
$closureB.invoke() # The givenValue is 11.
$closureB.invoke() # The givenValue is 11.

$givenValue = 20
$closureA.invoke() # The givenValue is 21.

function testIfSupportingDynamicBinding($prc){
    $givenValue = 100
    $prc.invoke()
}

testIfSupportingDynamicBinding $closureA # The givenValue is 101.
$closureA.invoke() # The givenValue is 21.

# Hence,
# We can say that PowerShell supports dynamic scope semantics.

echo ($closureA -eq $closureB) # However, this is "False".