Minetest: Count Entities

minetest.register_chatcommand("ce", {
    params = "[<range>]",
    description = "Counts entities in a <range> radius sphere. Default is 5.",
    func = function(name, param)
        local n = tonumber(param)
        if n == nil then n = 5 end
        local p = minetest.get_player_by_name(name)
        local l = minetest.get_objects_inside_radius(p:getpos(), n)
        minetest.chat_send_player(name, "There are "..(#l).." entities in the area.")
    end,
})