Learning Materials

Hello and welcome to the GDScript fundamental tutorial series.

In this episode, I go over variables in Godot GDScript.

In computer science, a variable stores information to be referenced to and manipulated in a computer program.

In GDScript, you define a variable using the var keyword.

You need to have 4 crucial things in a single line of code to write a variable.

Use the var keyword to signify the creation of a variable
Immediately following the var keyword, come up with a name for the newly created variable
Use the = symbol to assign a value to your variable. The = character is also called the assignment operator
Lastly, after the = character, assign a literal value to your variable.

In the following example, the values a, b, and c are variables:

var a = "hello world"
var b = 100
var c = 9.5

The answer is, no, you don’t have to.

A variable without a value is called an uninitialized variable.

This means that a variable is declared, but no value has been assigned to it.

var a
var b
var c

The variables a, b, c are variables

Godot allows you to write typed variables.

This limits a variable to only contain values of a specific data type.

To create a typed variable, all you have to do is use the colon symbol (:) followed by the data type.

var a: int = 100
var b: String = "Hello world"
var c: float = 98.9
var d: bool = true

You can also infer the data type by the value being assigned to the variable:

var a := 100
var b := "Hello World"
var c := 98.9
var d := true

In Gdscript, values assigned to a typed variable must have a compatible type.

If you need to coerce a value to be a particular type, you can use the casting operator keyword as.

var text: String  = 100 as String
var num: int = "100" as int
var numFloat: float = 100 as float

Github Project:

Variables | Godot GDScript | Ep 1.1