How to return several items from a Powershell function

I agree with @Christian, and I add another solution.

First you can return using an array explicitly or implicitly :

A) explicitly

function ExplicitArray ()
{
  $myArray = @()

  $myArray += 12
  $myArray += "Blue"

  return ,$myArray
}

Clear-Host
$a = ExplicitArray
Write-Host "values from ExplicitArray are $($a[0]) and $($a[1])"

B) implicitly

function ImplicitArray ()
{
  Write-Output 12

  Write-Output "Blue"
  return "green"
}

$b = ImplicitArray
Write-Host "values from ImplicitArray are $($b[0]), $($b[1]) and $($b[2])"

Second you can return a custom object :

A) Short form

function ReturnObject ()
{
  $value = "" | Select-Object -Property number,color
  $value.Number = 12
  $value.color = "blue"
  return $value
}
$c = ReturnObject
Write-Host "values from ReturnObject are $($c.number) and $($c.color)"

B) School form

function SchoolReturnObject ()
{
  $value = New-Object PsObject -Property @{color="blue" ; number="12"}
  Add-Member -InputObject $value –MemberType NoteProperty –Name "Verb" –value "eat"
  return $value
}
$d = SchoolReturnObject
Write-Host "values from SchoolReturnObject are $($d.number), $($d.color) and $($d.Verb)"

Third using argumen by reference

function addition ([int]$x, [int]$y, [ref]$R)
{
 $Res = $x + $y
 $R.value = $Res
}

$O1 = 1
$O2 = 2
$O3 = 0
addition $O1 $O2 ([ref]$O3)
Write-Host "values from addition $o1 and $o2 is $o3"