Command
	echo

Purpose
	Writes to screen or redirected output or error stream.

Aliases


Syntax
	echo	[ <options> ] [ <argument> [ <argument> ... ] ] 

Options
	-e
		Write to error stream. With this option, the output of echo command
		is written to the error stream. Without this option, the output is
		written to output stream.

		This option is very useful for inserting debugging messages in scripts.
		The following is an example.

		echo -e "DEBUG: Processing file " $fileName

Arguments
	<argument>
		A constant, a variable, an expression, a function call, an inline function,
		any combination of these using operators.

Stream Input	
	Ignored.

Stream Output
	Contents of all arguments are produced on one line, if -e option is NOT present.

Stream Error
	Any errors are listed here. Also, contents of all arguments are produced on one line
	here, if -e option IS present.

Description
	This command lists the contents of various types of arguments.

	If multiple arguments are specified, contents of each argument is
	produced.

	If inline command is used, that command is executed, and its
	stream output is produced.

	No formatting is used when listing output. This allows you to formt the output
	to the way you desire. Use formatting characters such as "\t" (tab), "\n" (newline),
	" " (space), etc. Use double quotes when using formatting characters.

	Use of parentheses and double quotes is highly recommended. Parentheses specify
	to the command TO EVALUATE the expression within the parentheses. Double quotes
	specify to the command NOT TO EVALUATE the text within double quotes.
	
	There is NO LIMIT on how many parentheses you can use.
	Further, there is NO LIMIT on how many levels of parentheses
	you can use.
		
Restrictions
	Expressions must be enclosed in parentheses.

Valid Examples
	echo $x
	Will display the value of variable x.

	var int i
	...
	echo ($i+5)
	Will display the value of i plus 5. The value of
	variable i itself, will remain unaffected.

Invalid Examples
	var int i
	...
	echo $i+3
	Will produce error. Parentheses must be used around expressions.
	The following will work.

	echo ($i+3)

See Also
set
var
systemvar