Basic Program Structure

Part of the Fundamentals section of Coddy's GDScript journey. Lesson 4 of 92.

Every program in this course has the same frame:

extends Node

func _ready():
	print("Hello, Coddy!")

extends Node is the first line of the script. In Godot, a game is built from nodes, and this line makes the script a node.

func _ready(): defines the function Godot calls when the node is ready. Your program starts there, and its statements run from top to bottom.

The colon (:) at the end of func _ready(): starts a block. Every statement inside the block is indented by one level. Godot indents with tabs; use the same indentation on every line of a block.

GDScript does not need a semicolon at the end of a statement. Each statement goes on its own line.

Challenge

Beginner

This program has two mistakes in its structure, so it does not run. Fix it so it prints:

Ready!
Let's go!

Add the missing colon at the end of func _ready()
Indent both print() lines by one level

Try it yourself

extends Node

func _ready()
print("Ready!")
print("Let's go!")

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction

The Language Hello World!CommentsBasic Program Structure

4Operators Part 1

Arithmetic Operators Integer Division Modulo Operator Arithmetic Shortcuts Recap - Simple Math Comparison Operators

7Basic IO

Output Output With Variables String Formatting Input Cast Recap - Till 120 Recap - True or False

10Functions

Declare a Function Arguments Return Return Types Recap - Sigma Function Recap - Validation Function Default Values

13Iterating Over Arrays

Iterating Over Elements Iterating With Indexes Iterating Over Strings Part 1 Iterating Over Strings Part 2

16Daily Expense Tracker

Project Overview Exit The Program

2Variables Part 1

Numbers String Boolean Empty Variables Naming Conventions

5Operators Part 2

Logical Operators Part 1 Logical Operators Part 2 Recap - Simple Logic Logical Operators Part 3 Ternary Operator

8Bill Split Calculator

Welcome Message Getting Input

Calculating The Tip And Total

Splitting The Bill

Formatted Output

11FizzBuzz with a Twist

Game Overview The FizzBuzz Function

Looping The Numbers

Adding The Twist

14Arrays Advanced

Array Slicing Sequence Operators Membership Sort And Reverse

17Final Challenges

Flat Asterisk Pyramid Pattern Finder What To Buy

Practice on your own: Online GDScript compiler