> For the complete documentation index, see [llms.txt](https://malbersanimations.gitbook.io/animal-controller/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://malbersanimations.gitbook.io/animal-controller/scriptable-architecture/scriptables/bool-var.md).

# Bool Var

## Overview

Bool variables are Scriptable Assets that contain a bool value. They can be referenced in any script and be shared around in a project.

## How to use it

To declare a Bool Var use this code. Make sure to have the namespace:

*`using MalbersAnimations.Scriptables;`*

```csharp
using MalbersAnimations.Scriptables;

public class Example : Monobehaviour
{    
    public BoolVar myVar
}
```

This is how it looks in the Inspector:

<figure><img src="/files/1Cuuak7rATzJGrBMbFaJ" alt=""><figcaption></figcaption></figure>

## Variable Reference

There is a better way to use the scriptable variables. Instead of using **`BoolVar`** class, use **`BoolReference`** instead:

```csharp
using MalbersAnimations.Scriptables;
using UnityEngine;

public class Example : MonoBehaviour
{
    public BoolReference myVar = new BoolReference();
}

```

This is how it looks in the Inspector:

<figure><img src="/files/iowDX70tUC3mJf9IHe5s" alt=""><figcaption></figcaption></figure>

That way you have the option to use a local value or a Scriptable (global) value.

Sharing scriptable variables is an extremely useful tool to have shared values between scripts.

## Parameters

<figure><img src="/files/n6IKoEvAOeJWukEuVEb0" alt=""><figcaption></figcaption></figure>

### Value

The actual value of the scriptable variable.

### Debug \[🪲]

When enabled, the console will print a log every time the scriptable variable changes its value

### Description

Developer description to give a better explanation of what the variable does.

## Internal Events

Scriptable Variables can be listened to using the OnValue changed action.

This is the way of using it via script:

```csharp
using MalbersAnimations.Scriptables;
using UnityEngine;

public class Example : MonoBehaviour
{
    public BoolReference myVar = new BoolReference();


    private void OnEnable()
    {
        myVar.Variable.OnValueChanged += OnValueChanged;
    }

    private void OnDisable()
    {
        myVar.Variable.OnValueChanged += OnValueChanged;
    }

    private void OnValueChanged(bool value)
    {
        //listen to value changes here
    }
}
```