Simple template for a PowerShell function

PowerShell-function-template-1.ps1

function Verb-Noun {

    <#
    .SYNOPSIS
    Short description
    .DESCRIPTION
    Long description
    .EXAMPLE
    Verb-Noun
    Example of how to use this cmdlet
    .EXAMPLE
    Verb-Nound -Param1 test
    Another example of how to use this cmdlet
    .NOTES
    General notes
    #>

    [CmdletBinding()]
    Param(
        # Param1 help description
        [Parameter(Mandatory=$true)]
        [ValidateNotNull()]
        [ValidateNotNullOrEmpty()]
        [ValidateCount(0,5)]
        [ValidateSet('Venus', 'Earth', 'Mars')]
        [string]$Planet,

        # Param2 help description
        [AllowNull()]
        [AllowEmptyCollection()]
        [AllowEmptyString()]
        [ValidateScript({$true})]
        [ValidateRange(0,5)]
        [int]$Param2,

        # Param3 help description
        [ValidatePattern('LON-\w{2,3}\d{1,2}')]
        [ValidateLength(0,15)]
        [String]$ComputerName,

        [Parameter(Mandatory=$true, 
            HelpMessage='On or off')]   # interactive helpmessage: use !? if this is a required parameter
        [string]$Param4,

        [switch]$Param5
    )

    foreach($Computer in $ComputerName) {

        $properties = [ordered]@{
        'Version' = 2;
        'Model'   = 'X'
        }

        $output = New-Object -TypeName PSObject -Property $properties
        Write-Output $output
    }
}