LUA(1) -- $Date: 2020/05/21 19:31:21 $

NAME
	lua - Lua interpreter

SYNOPSIS
	lua [ options ] [ script [ args ] ]

DESCRIPTION
	lua  is  the  standalone  Lua  interpreter.   It  loads  and
	executes Lua programs,  either in textual source  form or in
	precompiled binary  form.  (Precompiled binaries  are output
	by luac,  the Lua  compiler.)  lua  can be  used as  a batch
	interpreter and also interactively.

	After handling the  options, the Lua program  in file script
	is loaded and executed.  The args are available to script as
	strings in a global table named arg and also as arguments to
	its  main  function.   When called  without  arguments,  lua
	behaves as  lua -v -i if  the standard input is  a terminal,
	and as lua - otherwise.

	In interactive mode, lua prompts  the user, reads lines from
	the standard input, and executes  them as they are read.  If
	the line contains an expression,  then the line is evaluated
	and the  result is printed.   If a  line does not  contain a
	complete statement, then a secondary prompt is displayed and
	lines are  read until  a complete statement  is formed  or a
	syntax error is found.

	Before handling command line options and scripts, lua checks
	the contents  of the environment variables  LUA_INIT_5_4 and
	LUA_INIT, in  that order.  If  the contents are of  the form
	'@filename',  then  filename  is executed.   Otherwise,  the
	contents are assumed to be  a Lua statement and is executed.
	When LUA_INIT_5_4 is defined, LUA_INIT is ignored.

OPTIONS

	-e stat
		execute statement stat.

	-i   enter interactive mode after executing script.

	-l name
		require library name into global name.

	-v   show version information.

	-E   ignore environment variables.

	-W   turn warnings on.

	--   stop handling options.

	-    stop handling options and execute the standard input as
		a file.

ENVIRONMENT VARIABLES
	The following environment variables  affect the execution of
	lua.   When  defined,  the  version-specific  variants  take
	priority and the version-neutral variants are ignored.

	LUA_INIT, LUA_INIT_5_4
		Code  to be  executed before  command line  options and
		scripts.

	LUA_PATH, LUA_PATH_5_4
		Initial  value  of  package.cpath,  the  path  used  by
		require to search for Lua loaders.

	LUA_CPATH, LUA_CPATH_5_4
		Initial  value  of  package.cpath,  the  path  used  by
		require to search for C loaders.

EXIT STATUS
	If a  script calls  os.exit, then lua  exits with  the given
	exit status.   Otherwise, lua exits with  EXIT_SUCCESS (0 on
	POSIX systems) if there were no errors and with EXIT_FAILURE
	(1 on POSIX systems) if there were errors.  Errors raised in
	interactive mode do not cause exits.

DIAGNOSTICS
	Error messages should be self explanatory.

SEE ALSO
	luac(1)
	The documentation  at lua.org,  especially section 7  of the
	reference manual.

AUTHORS
	R. Ierusalimschy, L. H. de Figueiredo, W. Celes
