--mytable.lua
local mytable = {}

mytable.myfunction = function()
    print("ohai")
end

mytable.hello = "world"

mytable.myReturningFunction = function()
    return mytable.hello
end

return mytable

--mytableusage.lua
local tbl = require("mytable.lua")
print(tbl.hello)
print(tbl.myReturningFunction())
tbl.myfunction()