This is the built-in help made by Microsoft for the document 'about_Reserved_Words', in PowerShell version 2 - as retrieved from
Windows version 'Microsoft® Windows Vista™ Ultimate ' 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.
TOPIC
about_Reserved_Words
SHORT DESCRIPTION
Lists the reserved words that cannot be used as identifiers because they
have a special meaning in Windows PowerShell.
LONG DESCRIPTION
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:
Break
Continue
Do
Else
Elseif
Filter
For
Foreach
Function
If
In
Local
Private
Return
Switch
Until
Where
While
For information about language statements, such as 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:
get-help about_foreach
For information about the Filter statement or the Return statement
syntax, type:
get-help about_functions
about_Command_Syntax
about_Escape_Characters
about_Language_Keywords
about_Parsing
about_Quoting_Rules
about_Script_Blocks
about_Special_Characters