• Main program which calls others (chain.ps1)

$a = 5
$a 
& cmd /c nest.bat
& ./n1.ps1
$a

• Nest.bat

@echo off
echo Calling Bat file

• ns1.ps1

write-host "Hello from n1.ps1"
write-host $a
$a += 1
$a
$global:a = 6
return $a

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