--calculator by rnd if not init then init = true self.msg_filter("",false) say(minetest.colorize("red","#Calculator started. say ,1+1 or x=2;return x^0.5 ")) end msg = self.sent_msg() if msg and msg~="" then local result,err; local f; if not string.find(msg,"return") then msg = "return " .. msg end f,err = _G.loadstring(msg); if err then say("#compile error: " .. err) else err,result = pcall(f); if not result then say("#run error: " ..err) else result = tonumber(result) if result then say(minetest.colorize("lawngreen",msg .. " -> " .. result)) else say("empty result") end end end end