Keywords

Flow-Wing programming language supports the following keywords, grouped by category:

Types

Keyword	Description	Docs
int	32-bit integer type	Data Types
int8	8-bit integer type	Data Types
int64	64-bit integer type	Data Types
str	String type	Data Types
char	Character type (single Unicode character)	Data Types
deci	Decimal type (64-bit)	Data Types
deci32	32-bit decimal type	Data Types
bool	Boolean type	Data Types
nthg	Represents 'nothing' or 'void'	Data Types
unknown	Reserved — the compiler's internal name for a dynamic value's type. Cannot be written in source; use dyn or omit the annotation	Data Types

Literal Values

Keyword	Description	Docs
true	Boolean true value	Data Types
false	Boolean false value	Data Types
null	Null value; type of the null literal	Data Types

Control Flow

Keyword	Description	Docs
if	Conditional statement	Or if else Statement
or	Starts an alternative if branch — or if. Not a boolean operator; use || for logical OR	Or if else Statement
else	Alternative branch in conditional statement	Or if else Statement
switch	Switch statement	Switch Statement
case	Case in a switch statement	Switch Statement
default	Default case in a switch statement	Switch Statement

Concurrency

Keyword	Description	Docs
spawn	Queue a function call as a concurrent task	Concurrency with spawn

Loops

Keyword	Description	Docs
while	Looping statement	While Loop
for	Looping statement	For Loop
to	Used in range expressions	For Loop
continue	Skip to the next iteration in a loop	While Loop
break	Exit from a loop	While Loop

Declarations

Keyword	Description	Docs
var	Variable declaration	Variables and Constants
const	Constant declaration	Variables and Constants
fun	Function declaration	Declare and Define Functions
class	Class declaration	Class
type	Define a custom type	Custom Types and Objects
decl	Forward-declare a type/function	Declare and Define Functions
return	Return a value from a function	Declare and Define Functions

Modules & Imports

Keyword	Description	Docs
bring	Import a module or file	Bring Import Exports
expose	Expose functionality of a module	Bring Import Exports
from	Used in import statements	Bring Import Exports
module	Module declaration	Creating and Using Modules

Object-Oriented

Keyword	Description	Docs
new	Instantiate a class or object	Class
extends	Inherit from a superclass	Inheritance
inout	Parameter passing mode	Declare and Define Functions
as	Type casting or aliasing	Data Types

Other

Keyword	Description	Docs
fill	Fill a data structure	Fill Expression