This is the built-in help made by Microsoft for the document 'about_Reserved_Words', in PowerShell version 5 - as retrieved from
Windows version 'Microsoft Windows Server 2012 R2 Standard' PowerShell help files on 2016-06-24.
For PowerShell version 3 and up, where you have Update-Help, this command was run just before creating the web pages from the help files.
Lists the reserved words that cannot be used as identifiers because they
have a special meaning in Windows PowerShell.
There are certain words that have special meaning in Windows PowerShell.
When these words appear without quotation marks, Windows PowerShell
attempts to apply their special meaning rather than treating them as
character strings. To use these words as parameter arguments in a command
or script without invoking their special meaning, enclose the reserved
words in quotation marks.
The following are the reserved words in Windows PowerShell:
Begin Exit Process
Break Filter Return
Catch Finally Sequence
Class For Switch
Continue ForEach Throw
Data From Trap
Define Function Try
Do If Until
DynamicParam In Using
Else InlineScript Var
ElseIf Parallel While
End Param Workflow
For more information about language statements, including Foreach, If,
For, and While, type "Get-help", type the prefix "about_", and then type
the name of the statement. For example, to get information about the
Foreach statement, type:
For information about the Filter statement or the Return statement
For information about other reserved words, type: