Command
	help

Purpose
	Shows help on given topics or search words.

Aliases
	help, hlp, hl, man

Syntax
	help	[ <options> ]  [ <word> [<word> [<word> ...] ] ]

Arguments
	<word>	The name of a help topic or word to serach for in help contents.

		Multiple <word>s can be specified. If you wish to serach for a search string containing spaces,
		use double quotes around that string.

		<word>s can be specified with the use of expressions.

Options
	If no options are specified specified, <word>s are assumed to be help topics, and help
	on those topics is produced.

	-s	All help contents are searched for <word>s and a list of matching topics is produced.

Stream Input	
	Ignored.

Stream Output
	If no options are specified, help pages on the specified topics are produced here.

	If no <word>s are specified, a list of available topics is produced in the following format.

	Topic		Type		Purpose
	======================================================================
	do		Command		Creates and executes a block of commands.

	If -s is specified, a list of matching topics is produced in the above format. Topics are listed in
	order of relevance.

	Note that the headers are not produced in the actual stream output. The headers are shown here
	for simplicity of explaining.

Stream Error
	Any errors are listed here.

Description
	This command provides help on various topics. The topics include commands, functions, variables,
	system features, etc.

	<word>s are treated as case-insensitive.

	Help topics, when being displayed, use the following notation.

	<item>	When an item is enclosed in angular brackets, substitute it with an appropriate object
		(file name, path, constant, expression, etc.). When an item is not enclosed in angular brackets,
		enter that item exactly as it shown.

	[item]	When an items is enclosed in square brackets, it is optional. When an item is not enclosed in
		square brackets, it is required.

	[item1 [item2 [item3] ] ]	When square brackets are nested, the items, if specified, can only be specified in
		order from left to right. item1 is optional. item2 is also optional, but can be specified only if item1
		is specified. item3 is also optional, but can be specified only if item1 and item2 are specified.

	...	Three dots mean etc. 

	item1 | item2	When two or more items are separated by vertical bar, use only one of them.


	"item"	When an item is enclosed in double quotes, it needs to be enclosed in double quotes.
		(Double quotes indicate that the item is a string (str) constant.)

	(item)	When an item is enclosed in parentheses, it needs to be enclosed in parentheses.
		(Parentheses indicate that the item is an expression, and needs to be evaluated.)

		
Restrictions
	Expressions must be enclosed in parentheses.

	Depending on search words and expressions, execution of the search option may be slow.

Valid Examples
	help
	Will show a listing of all help topics.

	help echo
	Will show help page on the echo command.

	help help
	Will show help on the help command itself.

Invalid Examples
	help delete
	Will produce error. There is no help topic "delete".

	help -s "delete"
	Will result in searching the topics for the str "delete"
	and displaying the list of resulting topics.

See Also
echo
repro