03 - Basic Programing Logic

Data Types

Variable Types

Variables can be created in a variety of different types, including data types - such as Boolean, integer, and float - as well as reference types for holding things like Objects, Actors, and particular Classes. Arrays of each variable type can also be created. Each type is color coded for easy identification:


Variable Type	Color	Represents
Boolean	Maroon	True or false value (`bool`).
Byte	Sherpa blue	Whole number value bewtween 0 and 255 (`unsigned char`).
Integer	Sea green	Whole number value between −2,147,483,648 and 2,147,483,647 (`int`).
Integer64	Moss green	Whole number value between −9,223,372,036,854,775,808 and 9,223,372,036,854,775,807 (`long`).
Float	Yellow green	Number value with a decimal such as 0.0553, 101.2887, and -78.322 (`float`).
Name	Mauve	Piece of text used to identify something in the game.
String	Magenta	Group of alphanumeric characters such as `Hello World` (`string`).
Text	Pink	Text that you display to users. Use this type for text that you want to localize.
Vector	Gold	Set of three numbers (X, Y, and Z). This type is useful for 3D coordinates and RGB color data.
Rotator	Cornflower blue	Group of numbers that define rotation in 3D space.
Transform	Orange	Set of data that combines translation (3D position), rotation, and scale.
Object	Blue	Blueprint objects such as Lights, Actors, StaticMeshes, Cameras, and SoundCues.

Variables

Variables are properties that hold a value or reference an Object or Actor in the world. These properties can be accessible internally to the Blueprint containing them, or they can be made accessible externally so that their values can be modified by designers working with instances of the Blueprint placed in a level.