Template PowerShell script with help and params

Template.ps1

<#
.SYNOPSIS
    10 words
.DESCRIPTION
    Tweet
.NOTES
    Full description
    On multiple lines
.PARAMETER Mandatory
    This ian a mandatory param
.PARAMETER Optional
    This is an optional param
.PARAMETER Help
    Show this help.
.EXAMPLE
    Template.ps1 -Mandatory mandatoryValue -Optional optionalValue


#>
param([Parameter(Mandatory=$true)][string]$Mandatory, [string]$Optional="optionalValue",[switch]$Help)
$ErrorActionPreference = "Stop"