Function - loop

The loop() function is what's run on every game frame; be careful of what you put here as you can potentially freeze or crash your game, but such is life - trial and error, live and learn. You can actually be(come) quite creative here, skipping a few frames if you don't want or need your code to be run on every frame, by utilizing a counting/number variable and an if statement for example.

Example #1 (Very Basic And Barebones):

--[ (Optionally) Localize the print function for faster access ](/JayMontana36/LuaPlugin-GTAV/wiki/-(Optionally)-Localize-the-print-function-for-faster-access-)
local print = print
return {
    loop = function()
               print("Hello World!")
           end
}

Example #2 (Basic/Wait):

--[ (Optionally) Localize the print function for faster access aka lower latency and etc. ](/JayMontana36/LuaPlugin-GTAV/wiki/-(Optionally)-Localize-the-print-function-for-faster-access-aka-lower-latency-and-etc.-)
local print = print

--[ Create an integer number variable to store the time in for when your script should run next ](/JayMontana36/LuaPlugin-GTAV/wiki/-Create-an-integer-number-variable-to-store-the-time-in-for-when-your-script-should-run-next-)
local TimeToWaitUntil = 0 -- Default to 0 on script startup

return {
    --[ Info - a table variable containing various common information from within the game ](/JayMontana36/LuaPlugin-GTAV/wiki/-Info---a-table-variable-containing-various-common-information-from-within-the-game-)
    loop = function(Info)
               --[ If it is time for the script to run again then ](/JayMontana36/LuaPlugin-GTAV/wiki/-If-it-is-time-for-the-script-to-run-again-then-)
               if Info.Time >= TimeToWaitUntil then
                   --[ Do Stuff ](/JayMontana36/LuaPlugin-GTAV/wiki/-Do-Stuff-)
                   print("Hello World! 5 seconds or 5000 milliseconds have passed!")
                   --[ Update the integer number variable with the current time and the amount of time to wait for next run ](/JayMontana36/LuaPlugin-GTAV/wiki/-Update-the-integer-number-variable-with-the-current-time-and-the-amount-of-time-to-wait-for-next-run-)
                   TimeToWaitUntil = Info.Time + 5000
               end
           end
}

The "Info" variable (1st argument sent to loop functions) and game native function call examples:

Structure/Layout:

{
    Time	--[ integer number ](/JayMontana36/LuaPlugin-GTAV/wiki/-integer-number-)
    Player	{
		    Id		--[ Id/Handle ](/JayMontana36/LuaPlugin-GTAV/wiki/-Id/Handle-)
		    Ped		--[ Ped/Entity Id/Handle ](/JayMontana36/LuaPlugin-GTAV/wiki/-Ped/Entity-Id/Handle-)
		    Coords	--[ Vector3 ](/JayMontana36/LuaPlugin-GTAV/wiki/-Vector3-)
		    Vehicle	{
				    IsIn	--[ boolean - Is Player In The Vehicle ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean---Is-Player-In-The-Vehicle-)
				    IsOp	--[ boolean - Is Player Operating The Vehicle ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean---Is-Player-Operating-The-Vehicle-)
				    Id		--[ Vehicle/Entity Id/Handle ](/JayMontana36/LuaPlugin-GTAV/wiki/-Vehicle/Entity-Id/Handle-)
				    NetId	--[ integer Network Id/Handle ](/JayMontana36/LuaPlugin-GTAV/wiki/-integer-Network-Id/Handle-)
				    Model	--[ hash ](/JayMontana36/LuaPlugin-GTAV/wiki/-hash-)
				    Name	--[ string ](/JayMontana36/LuaPlugin-GTAV/wiki/-string-)
				    Type	{
						    Bicycle		--[ boolean ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean-)
						    Bike		--[ boolean ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean-)
						    Boat		--[ boolean ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean-)
						    Car			--[ boolean ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean-)
						    Heli		--[ boolean ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean-)
						    Jetski		--[ void - nothing ](/JayMontana36/LuaPlugin-GTAV/wiki/-void---nothing-)
						    Plane		--[ boolean ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean-)
						    Quadbike		--[ boolean ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean-)
						    Train		--[ boolean ](/JayMontana36/LuaPlugin-GTAV/wiki/-boolean-)
						    AmphibiousCar	--[ void - nothing ](/JayMontana36/LuaPlugin-GTAV/wiki/-void---nothing-)
						    AmphibiousQuadbike	--[ void - nothing ](/JayMontana36/LuaPlugin-GTAV/wiki/-void---nothing-)
						}
				}
		}
}

Usage Examples:

return {
    loop = function(Info)
               --[ Get the player's ped entity ID ](/JayMontana36/LuaPlugin-GTAV/wiki/-Get-the-player's-ped-entity-ID-)
               local PlayerPed = Info.Player.Ped

               --[ FiveM style game native function call ](/JayMontana36/LuaPlugin-GTAV/wiki/-FiveM-style-game-native-function-call-)
               SetEntityInvincible(PlayerPed, false)

               --[ Older/Legacy style game native function call ](/JayMontana36/LuaPlugin-GTAV/wiki/-Older/Legacy-style-game-native-function-call-)
               ENTITY.SET_ENTITY_INVINCIBLE(PlayerPed, false)

               --[ Check if the player is in a vehicle and if the player is the operator of a vehicle ](/JayMontana36/LuaPlugin-GTAV/wiki/-Check-if-the-player-is-in-a-vehicle-and-if-the-player-is-the-operator-of-a-vehicle-)
               if Info.Player.Vehicle.IsIn and Info.Player.Vehicle.IsOp then

                   --[ Get the player's vehicle entity ID ](/JayMontana36/LuaPlugin-GTAV/wiki/-Get-the-player's-vehicle-entity-ID-)
                   local PlayerVeh = Info.Player.Vehicle.Id

                   --[ FiveM style game native function call ](/JayMontana36/LuaPlugin-GTAV/wiki/-FiveM-style-game-native-function-call-)
                   SetVehicleNumberPlateText(PlayerVeh, "0  HI  0")

                   --[ Older/Legacy style game native function call ](/JayMontana36/LuaPlugin-GTAV/wiki/-Older/Legacy-style-game-native-function-call-)
                   VEHICLE.SET_VEHICLE_NUMBER_PLATE_TEXT(PlayerVeh, "0  HI  0")
               end
           end