Variables and Data Types

RCBasic has two fundamental data types: Numbers and Strings.

Numbers

Number variables store integer or floating-point values. Variable names must not end with $:

  score   = 100
speed   = 3.14
lives   = 3

Strings

String variables store sequences of characters. Their names must end with $:

  name$    = "Alice"
message$ = "Game Over"

Constants

Use Const to declare a value that never changes:

  Const MAX_LIVES = 3
Const TITLE$    = "My Game"

Arrays

Arrays store multiple values under one name. Declare them with Dim:

  Dim scores[10]          ' number array with 10 elements (0–9)
Dim names$[5]           ' string array with 5 elements

scores[0] = 95
names$[0] = "Alice"

Multi-dimensional arrays:

  Dim grid[8][8]          ' 8×8 number grid
grid[3][4] = 1

User-Defined Types

Group related variables into a Type (a struct-like record):

  Type Player
    x
    y
    health
    name$
End Type

Dim p As Player
p.x      = 100
p.y      = 200
p.health = 100
p.name$  = "Hero"

Type arrays:

  Dim enemies[10] As Player
enemies[0].x = 50