Let's go ahead and talk about variables to declare variables. First type the visibility keyword, then the type and the name. For example, public light, the type light onto the name, my light. So again, the public is the visibility keyword. Light is the type and, and my light is the name. There are two main visibility types private and public.

What's the difference? Well, private can only be accessed within this particular script within this particular class. If you make this public then it's accessible to all the scripts and other classes. So that means other people can access it and change its value. Moreover, public variables can be changed in the inspector from the Unity editor. For example, let's create a variable a and public be.

And so here we have our public variables my light, and P. and we can change it for example, turn. And remember we can't do it in the plane mode because it will not be saved. So, type 10. If you change a variable here, the Unity will use this number So let's go back. But what if we want our variable to be private so that no other groups and classes can modify it? And in the meantime, wanted to be visible?

Well, here's an attribute serialized field in square brackets. Let's go to a private variable. All right. Save. And now, we are going to see that. Yeah, here we go.

Hey. It is still private, but we can see it and modify it in the information. Factor panel. Okay, now let's go ahead and talk about variables types. You already know the type and whole number. There are many types like fluid flow it is a float point number like 10.6.

And don't forget to type after that. If you use float type, after that we have string type string as a string, for example as type I love my game. Alright, so a stream Oh Yeah, we have we already have a. So let's use all the letter C. So that's why I love this Visual Studio because it helps a lot. All right after that we have bull type bull. The bull type, is that true or false?

So these are standard C sharp types. Okay, let's save it and take a look how it works in our game. So yeah, we see a B, D, C, E, so the E is a bool. Variable checked means true, unchecked means false. As I told you, this types are standard see Shark types, but besides them, we have many types, which works only in unity, such as light. Here, also we have camera type camera.

We also have even a rigid body. I think you remember, if you need a variable rigid body, you can use this type. And the reason we need to know our type is, for example, if you're trying to add two things together, and their types are int, like we have here, A and B, and, and so unit says, Yeah, I can do that. And if you try to add for example, B and D, so int plus float, Yeah, no problem. For example, let's go inside our start function. Create a new variable M and let a b b plus plus d. The word type means, hey compiler, find the type by yourself.

So and after that we print our M. All right, so go back to unity. So right. And when our start function was called in the very beginning, we have our 15.6. And I think that's correct. That's five plus 10.6. All right.

But if you're trying to add two variables, one of which is int, and the second is up for example, light, so good to take can't do that because it doesn't know how to you manipulate them. So that's why the type is important and you should never forget about it.