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36b863 lisa 2026-08-12 09:10:36
Add C07 study pages; regenerate C06 via the shared port script sd/C07: home + Naming Conventions, Internal Documentation, Validation Techniques (21 skill codes), linked from the SD hub. sd/C06 pages regenerated by sat/port-reference-godot-to-wiki.py (marker update; C06-home now generated from the repo README like every other page). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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<!-- Generated from applied-computing-au vic/unit3-4/sat/C06-2026/C06-Reference-Godot by port-reference-godot-to-wiki.py — do not hand-edit; re-run the port. -->
3aab9f lisa 2026-08-11 23:24:06
Add C06 skill-code study pages, linked from the SD hub Eleven pages ported from the applied-computing-au C06-Reference-Godot standard: home page with the 34-code lookup, per-topic pages with labelled GDScript examples, evidence standards, and Check Your Understanding fold blocks. Generated mirror — repo copy is canonical. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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# Data Types — GDScript
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**Skill codes on this page**
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| Code | Level | Skill |
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|---|---|---|
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| C613 | 1–2 | text data |
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| C614 | 1–2 | numeric data |
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| C615 | 1–2 | Boolean data |
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| C629 | 3–4 | outlines, in the internal documentation, why the selected data types were used |
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**Definition.** A *data type* classifies a variable: what data it can contain and how that data can be manipulated.
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At level 1–2 the skill is **identifying** the three data families in your own code. Using them with *stated* types is C628/C634 — see [Local and Global Variables](/sd/C06/Local%20and%20Global%20Variables).
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**Earns the tick:** one labelled line per family — text, numeric, Boolean — in code that runs.
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## C613 — Text data
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**Definitions.** *Character:* a single meaningful unit — a letter, digit, punctuation mark, symbol or space. *String:* a sequence of characters.
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### Character
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GDScript has no separate character type — use a one-character String:
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```gdscript
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var chr_var: String = "A" # C613 — text: character
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```
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### String
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```gdscript
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var str_var: String = "Hello!" # C613 — text: string
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```
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## C614 — Numeric data
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**Definitions.** *Integer:* whole positive and negative numbers. *Floating point:* computer representation of real numbers, with decimal places. *Numeric:* both families together.
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### Integer
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```gdscript
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var int_var: int = 42 # C614 — numeric: integer
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```
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### Floating point
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```gdscript
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var float_var: float = 3.14 # C614 — numeric: floating point
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```
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## C615 — Boolean data
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**Definition.** A data type with one of two possible values, usually referred to as False and True.
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```gdscript
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var bool_var: bool = true # C615 — Boolean
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```
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## Spot them in a studied project
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```gdscript
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# tile-matching-game — card.gd / game.gd
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var pair_id := "" # C613 — text: a String, inferred from ""
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var score := 0 # C614 — numeric: an int
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@export var flip_back_delay := 1.2 # C614 — numeric: a float
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var is_face_up := false # C615 — Boolean
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```
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These use `:=` inference — fine, as long as your comment names the type (see the warning in [Local and Global Variables](/sd/C06/Local%20and%20Global%20Variables)).
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## Date/time
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No skill code of its own — it counts toward the level 9–10 *range* (C657).
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```gdscript
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var dt_var = Time.get_datetime_dict_from_system() # counts toward C657 — range of types
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```
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That call returns a Dictionary of year, month, day, hour and so on — which is also a **record**; see [Data Structures](/sd/C06/Data%20Structures).
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## C629 — Why these data types
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Level 3–4 asks you to **outline** the reason in internal documentation — a phrase is enough:
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```gdscript
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var balance: float = 20.00 # C629 — float: money needs decimal places
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var card_id: String = "" # C629 — String: digits never used in a calculation
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```
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The reasons come from how each type behaves — the input/storage/output view is in [Data Type Characteristics](/sd/C06/Data%20Type%20Characteristics).
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**Also name it when you do it:** *casting* — converting a value from one type to another — is everyday Godot: `int($ZoneInput.text)`, `str(fares[0])`.
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## Check Your Understanding
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1. Name the three level 1–2 data families and their codes.
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>| ### Answer
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>| Text C613, numeric C614, Boolean C615.
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2. Why does `var trips = 0` earn nothing for data types?
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>| ### Answer
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>| No type is stated or named in a comment — there is nothing for the marker to assess.
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3. What is casting? Give one Godot example.
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>| ### Answer
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>| Converting a value between types — e.g. `int($ZoneInput.text)` turns the typed text into a number.