In Lua, is there a function that will tell me what current version I'm running?

Question

Subject says it all. I would like to know if my host interpreter is running Lua 5.2 or 5.1

Answer 1

There is global variable _VERSION (a string):

print(_VERSION)  -- Output Lua 5.2 

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UPD :
Other methods to distinguish between Lua versions:

if _ENV then    -- Lua 5.2 else   -- Lua 5.1 end 

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UPD2 :

--[=[ local version = 'Lua 5.0' --[[]=] local n = '8'; repeat n = n*n until n == n*n local t = {'Lua 5.1', nil,   [-1/0] = 'Lua 5.2',   [1/0]  = 'Lua 5.3',   [2]    = 'LuaJIT'} local version = t[2] or t[#'\z'] or t[n/'-0'] or 'Lua 5.4' --]] print(version)