os.exit ([code [, close]])
Calls the ISO C function exit
to terminate the host program. If code
is true, the returned status is EXIT_SUCCESS
; if code
is false, the returned status is EXIT_FAILURE
; if code
is a number, the returned status is this number. The default value for code
is true.
If the optional second argument close
is true, closes the Lua state before exiting.
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