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:
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:
For information about the Filter statement or the Return statement