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Scope

The scope is the region of a computer program where a name binding is valid. Name binding is just a fancy word for saying “variables”.

Scopes can vary in range in a programming application.

These can be from small for loops and if statements to entire classes.

Levels of Scope

Global Scope
Class/File/Module Scope
Function Scope
Code Block Scope

Global Scope

Global scope is a class, variable, or function that can be used anywhere in the Godot Application.

An example would be the Node class:

extends Node

# The rest of your class

Class Scope

A class scope is a variable or function that can be used anywhere in the class file.

extends Node # Global Scope Class Name Node

# Class variables that can be used anywhere in the class file
var health: String = 100
var speed: float = 10.0

Function Scope

A variable/value that can only be used inside of a function

extends Node # Global Scope Class Name Node

#Class Scope
var health: String = 100
var speed: float = 10.0

func example():
    # variable functionVariable can only be used inside of the function `example()`
    var functionVariable = 10

Code Block Scope

A variable/value that can only be used inside of a code block.

Example fo code blocks would be the if statement, match statement, for & while loops, etc:

extends Node # Global Scope Class Name Node

# Class Scope
var health: String = 100
var speed: float = 10.0

func example():
    # Function Scope
    var functionVariable = 10
    if(true):
        # Code Block Scope
        # variable message exists only inside this one if statement
        var message = "Hi!"
        print(message)