Package 路徑

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whatever = require "whatever"       

Lua 會嘗試在許多地方尋找名為 whatever 的 package，其名稱通常會在某處有 whatever。 如果未找到任何一個，則 Lua 會顯示一個錯誤訊息，列出所有這些名稱，類似於

stdin:1: module 'whatever' not found:
	no field package.preload['whatever']
	no file '/usr/local/share/lua/5.2/whatever.lua'
	no file '/usr/local/share/lua/5.2/whatever/init.lua'
	no file '/usr/local/lib/lua/5.2/whatever.lua'
	no file '/usr/local/lib/lua/5.2/whatever/init.lua'
	no file './whatever.lua'
	no file '/usr/local/lib/lua/5.2/whatever.so'
	no file '/usr/local/lib/lua/5.2/loadall.so'
	no file './whatever.so'
stack traceback:
	[C]: in function 'require'
	stdin:1: in main chunk
	[C]: in ?

該清單的示意圖保存在變數 package.path 中。 對於上述清單，該變數包含

/usr/local/share/lua/5.2/?.lua;/usr/local/share/lua/5.2/?/init.lua;/usr/local/lib/lua/5.2/?.lua;/usr/local/lib/lua/5.2/?/init.lua;./?.lua