How to call a FUNCTION FROM A DIFFERENT SCRIPT in Unity

In this video we'll see how to access from a script to a method that is defined in another script in Unity.

How to use functions that are in another Script:

1. We start with 2 scripts A and B. In A Script is the function we want to call. In B Script we will call the function that is in A.

2. In A Script we make sure that the function or method is declared as public, otherwise we will not be able to access it from an external context to A.

3. In B script we declare an object of A type and we must find the reference of that object. This will depend on where we are programming, in the case of Unity we will do it in the Start method, with the instruction GameObject.FindGameObjectWithTag() and to that GameObject we execute the GetComponent method. The final instruction looks like this:
a=GameObject.FindGameObjectWithTag().GetComponent{A}(); //(replace the curly brackets with the signs less than and greater than).

4. To call the function of the other A Script from B, we use the A reference that we define and with the dot operator we can access that function and use it inside the B Script.

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[RadioactiveBluePlatypus]

Could you have used other names than just "A" and "B"? It gets a bit confusing because the game object is called A but the script too and also the variable and everything and I don't know which A is the game object and which is the script and stuff

[LukeFlavel]

I'm so grateful. Other tutorials were leaving out the part where you define what a is. You're a lifesaver

[AboutLeon]

You're a real life saver I was getting so angry because I couldn't figure it out. Thanks so much! :D

[biki_]

very clear description bro.just improve mic Quality.❤

[Elenyen]

My first big problem in unity, but you solved it. Thank you ;)

[nishitakulkarni]

Great! Straight to the point! Thanks for this!

[DerWiNG]

thanks a lot, its a giant leap for me

[alonelyobserver]

Thank you very much, I don't understand why when we declare/instantiate the object based on class A it doesn't automatically get the characteristics from class A. the Null error was making me mad!!!

[anujpartihar]

So helpful, much appreciated good sir!

[loopmusic]

Resizing your visual studio font size would be great! Having issues identifying the tiny letters

[abcdefghjijklfgu]

Thank you so much I am using this for my game

[satobi]

Great video thank you, this helps a lot! ~

[iamsecrets]

Hey,
Just a heads up for the future. Could you possibly increase the font size in the script so the code takes up the entire window. It's almost unreadable on mobile at 1080p

[bachtiararyahabibie]

thankyou very much, this is solve my problem

[gofrisuto]

Simple and understandable method, but I would avoid tags, because they are a strings, and strings have many problems: easy to make a typo, hard to find that typo and the console will tell nothing. I think it's better to find the gameobject with the A script. Code:

[efaz]

Amazing video. This worked for me however only for one of my objects that had the script. I want this to work for every object in my scene that has the same script. Is there a way to do that or am I doing something wrong

[ABYZA]

thx bro thankfully you mention the "s" i got i wrong the first try hehehhe

[suzerain_k]

How do you do that if youre accessing another script in another gameobject of another scene?

[mxg]

Gracias, me funciono bien.... gracias

[macleodgordon]

Awesome managed to use this to solve a problem in my own project, so THANKS. BTW, your debug.Log statement says " ....from A", but in the second case where your method was called from Script B, it ought to say " ...from B" :(