Export Variables

Part of the Nodes and Scenes section of Coddy's Godot journey. Lesson 15 of 28.

Put @export in front of a variable and Godot's editor shows it in the Inspector. The Inspector is the panel that lists the properties of the node you pick. You can change the value there without editing code:

@export var speed = 200

The number in the script is the default. A value set in the Inspector is saved in the scene, and the node gets it when the game starts. Two robots with one script can have two speeds.

This lesson's scene sets the robot's speed to 90, as the Inspector would. The Scene tab under the game does not list exported variables, so you will not see it there.

Challenge

Easy

Let the scene set the robot's speed.

At the top of robot.gd, add an exported variable speed with a default of 200.
In _process(), move the robot right at speed pixels a second.

Press Play: the scene sets speed to 90, so the robot moves 90 pixels a second. Then Check.

Try it yourself

extends Node2D

func _process(delta):
	position.x += 200 * delta

All lessons in Nodes and Scenes

1Your First Godot Game

What Is Godot?Ready Runs Once Print in Godot The Scene Tree Set a Position Move a Node Once

4Finding Nodes

The Dollar Sign Node Paths Onready Change a Color Hide and Show

2Every Frame

Process Runs Every Frame Delta Pixels per Second Move Diagonally Spin With Rotation Grow With Scale

5Project: Screensaver

Screensaver: Drift Screensaver: Side Walls

Screensaver: Top and Bottom

Screensaver: Color List

Screensaver: New Colors

3Values You Can Tune

Variables on a Node ConstantsExport VariablesVector2 Math Wrap Around the Screen Your Own Functions

Practice on your own: Godot playground