ZBasicRef - page 4 of 208

4 of 208

ZBasic Language Reference

ZX Microcontroller Family

Defining Constants

.....................................................................................................18

Defining Variables.......................................................................................................19

Defining Arrays of Variables

.....................................................................................19

Defining Subroutines..................................................................................................20

Defining Functions......................................................................................................23

2.4 Expressions

....................................................................................................................24

2.4.1 Operator Precedence............................................................................................25

2.4.2 Operator Associativity

...........................................................................................26

2.4.3 Arithmetic Operators

.............................................................................................26

2.4.4 Logical Operators

..................................................................................................27

2.4.5 Comparison Operators..........................................................................................27

2.4.6 Miscellaneous Operators......................................................................................27

2.4.7 No “Short Circuit” Evaluation

...............................................................................27

2.5 Statements......................................................................................................................28

2.5.1 Assignment Statement..........................................................................................28

2.5.2 Call Statement........................................................................................................29

2.5.3 CallTask Statement

...............................................................................................29

2.5.4 Console.Write and Console.WriteLine Statements..........................................30

2.5.5 Debug.Print Statement..........................................................................................30

2.5.6 Do-Loop Statement and Variants........................................................................31

2.5.7 Exit Statement

........................................................................................................32

2.5.8 For-Next Statement

...............................................................................................32

2.5.9 Goto Statement

......................................................................................................34

2.5.10 If-Then-Else Statement.......................................................................................35

2.5.11 Single-line If-Then Statement

............................................................................36

2.5.12 Select-Case Statement.......................................................................................36

2.5.13 Set Statement

......................................................................................................38

2.5.14 While-Wend Statement.......................................................................................38

2.5.15 With Statement

....................................................................................................39

2.6 Literals

.............................................................................................................................39

2.6.1 Boolean Literals

.....................................................................................................39

2.6.2 Numeric Literals - Integral Values.......................................................................40

2.6.3 Numeric Literals - Real Values

............................................................................40

2.6.4 String Literals..........................................................................................................40

2.6.5 Built-in Binary Constants

......................................................................................41

2.7 Comments.......................................................................................................................41

2.8 Line Continuation and Multiple Statements Per Line...............................................41

2.9 Persistent Variables.......................................................................................................42

2.10 Program Memory Data Items.....................................................................................44

2.11 String Types

.................................................................................................................47

2.11.1 Bounded Strings

..................................................................................................47

2.11.2 Fixed-Length Strings...........................................................................................48