Function ListRunningServices
{
    $services+= Get-Service | ?{$_.Status -eq "Running"} | sort Name | select Name;
}

$services = @();
ListRunningServices;
$services;

Function ListRunningServices {
    Get-Service | ?{$_.Status -eq "Running"} | sort Name | select Name
}

$services = ListRunningServices
$services

Function ListRunningServices {
    $global:services = Get-Service | ?{$_.Status -eq "Running"} | sort Name | select Name
}

$services = @()
ListRunningServices
$services

Function ListRunningServices
{
    Get-Service | ?{$_.Status -eq "Running"} | sort Name | select Name |
     ForEach-Object {$services.add($_)}
}

$services = New-Object collections.arraylist
ListRunningServices
$services

Function ListRunningServices
{
    $services = @()
    $services+= Get-Service | ?{$_.Status -eq "Running"} | sort Name | select Name;
    return $services
}


$services = ListRunningServices
$services

Function ListRunningServices
{
    $global:services+= Get-Service | ?{$_.Status -eq "Running"} | sort Name | select Name;
}

$services = @();
ListRunningServices;
$services;

# Visible everywhere inside the script file (f.ex: myNameScript.ps1)
$script:names = @()

Function AddStringToArray ([string]$i_name) {
    $script:nam += $i_name
}

AddStringToArray -i_name "Markie"
AddStringToArray -i_name "Harry"