Unreal Engine Copies VS References EXPLAINED

Understanding how variables and paramaters work in unreal engine's blueprint is an important step to making your coding go a lot smoother. One of the things you need to figure out is what the different is between a reference and a copy parameter when making a function and when to use which.
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[@juggernautx1779]

Finally someone covered this properly!

[@Wrexthor]

Love videos like this that cover basic but often overlooked things, please keep doing it!

[@thegamedevcave]

Thank you! Will do!

[@carlosrivadulla8903]

If checking "pass by ref" modifies the original variable without setting it back or returning it from the function. What the node "set float(double-precission)(by ref)" is for?.

[@thegamedevcave]

It sets the value? You still need to set values the + node by itself doesnt execute anything. As shown in the video, you need to pass in a ref and then set it. If you try to set with that node without pass by ref, it sets the value of the local copy, not the original value that you put in

[@user-li7ce3fc3z]

Ну это уж совсем для чайников