ZBasicRef - page 4 of 172

4 of 172

ZBasic Language Reference

ZX Microcontroller Family

2.4 Expressions

....................................................................................................................22

2.4.1 Operator Precedence............................................................................................23

2.4.2 Operator Associativity

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

2.4.3 Arithmetic Operators

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

2.4.4 Logical Operators

..................................................................................................25

2.4.5 Comparison Operators..........................................................................................25

2.4.6 Miscellaneous Operators......................................................................................25

2.4.7 No “Short Circuit” Evaluation

...............................................................................25

2.5 Statements......................................................................................................................26

2.5.1 Assignment Statement..........................................................................................26

2.5.2 Call Statement........................................................................................................27

2.5.3 CallTask Statement

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

2.5.4 Console.Write and Console.WriteLine Statements..........................................28

2.5.5 Debug.Print Statement..........................................................................................28

2.5.6 Do-Loop Statement and Variants........................................................................29

2.5.7 Exit Statement

........................................................................................................30

2.5.8 For-Next Statement

...............................................................................................30

2.5.9 Goto Statement

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

2.5.10 If-Then-Else Statement.......................................................................................33

2.5.11 Select-Case Statement.......................................................................................34

2.5.12 Set Statement

......................................................................................................35

2.5.13 While-Wend Statement.......................................................................................36

2.5.14 With Statement

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

2.6 Literals

.............................................................................................................................37

2.6.1 Boolean Literals

.....................................................................................................37

2.6.2 Numeric Literals - Integral Values.......................................................................37

2.6.3 Numeric Literals - Real Values

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

2.6.4 String Literals..........................................................................................................38

2.6.5 Built-in Binary Constants

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

2.7 Comments.......................................................................................................................39

2.8 Line Continuation and Multiple Statements Per Line...............................................39

2.9 Persistent Variables.......................................................................................................39

2.10 Program Memory Data Items.....................................................................................41

2.11 String Types

.................................................................................................................45

2.11.1 Bounded Strings

..................................................................................................45

2.11.2 Fixed-Length Strings...........................................................................................45

2.12 Variable Initialization

...................................................................................................46

2.13 Type Conversions........................................................................................................46

2.14 Parameter Passing Conventions...............................................................................47

2.15 Program and Data Item Properties...........................................................................48

Chapter 3 - Advanced Topics..................................................................................................49

3.1 Scope and Lifetime........................................................................................................49