You can exit PowerShell by typing exit. So far so good. But what exactly is this?
PS Home:\> gcm exit
Get-Command : The term 'exit' is not recognized as the name of a cmdlet, function, script file, or operable program. Ch
eck the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:4
+ gcm <<<< exit
+ CategoryInfo : ObjectNotFound: (exit:String) [Get-Command], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException,Microsoft.PowerShell.Commands.GetCommandCommand
So it's neither a cmdlet, function, script or program. It leaves the question what exactly it is.
This unfortunately also means that one can't create aliases to exit:
PS Home:\> New-Alias ^D exit
PS Home:\> ^D
Cannot resolve alias '♦' because it refers to term 'exit', which is not recognized as a cmdlet, function, operable prog
ram, or script file. Verify the term and try again.
At line:1 char:2
+ ♦ <<<<
+ CategoryInfo : ObjectNotFound: (♦:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : AliasNotResolvedException
Are there any more such commands which are no commands?
ETA: Just for reference: I know I can simply wrap it into a function. My profile has the lines
# exit with Ctrl+D
iex "function $([char]4) { exit }"
in them. My question was just to know what exactly this command is.