PRINT thing
PR thing
(PRINT thing1 thing2 ...)
(PR thing1 thing2 ...)

	command.  Prints the input or inputs to the current write stream
	(initially the screen).  All the inputs are printed on a single
	line, separated by spaces, ending with a newline.  If an input is a
	list, square brackets are not printed around it, but brackets are
	printed around sublists.  Braces are always printed around arrays.