Module:HelloWorld

local p = {};    --All lua modules on Wikipedia must begin by defining a variable --that will hold their externally accessible functions. --Such variables can have whatever name you want and may --also contain various data as well as functions.

p.hello = function( frame )    --Add a function to "my_object". --Such functions are callable in Wikipedia --via the #invoke command. --"frame" will contain the data that Wikipedia --sends this function when it runs. local str = "Hello World!" --Declare a local variable and set it equal to                               --"Hello World!". return str   --This tells us to quit this function and send the information in                  --"str" back to Wikipedia. end -- end of the function "hello"

return p   --All modules end by returning the variable containing its --functions to Wikipedia.

-- Now we can use this module by calling. -- Note that the first part of the invoke is the name of the Module's wikipage, -- and the second part is the name of one of the functions attached to the -- variable that you returned.

-- The "print" function is not allowed in Wikipedia. All output is accomplished -- via strings "returned" to Wikipedia.