Language Specification

Variables

Variables are declared using the let keyword and are dynamically typed.

let name = "FlowLang-Script"
let version = 1
let pi = 3.14

Data Types

Integer: Whole numbers (42, -10)
String: Text enclosed in double quotes ("hello")
List: Returned by built-in functions like range()
Dictionary: Returned by JSON parsing in HTTP responses

Operators

Arithmetic Operators

Operator	Description	Example
`+`	Addition	`5 + 3` returns `8`
`-`	Subtraction	`10 - 4` returns `6`
`*`	Multiplication	`3 * 4` returns `12`
`/`	Division	`15 / 3` returns `5`

Comparison Operators

Operator	Description	Example
`<`	Less than	`5 < 10` returns `true`
`>`	Greater than	`10 > 5` returns `true`
`<=`	Less than or equal	`5 <= 5` returns `true`
`>=`	Greater than or equal	`10 >= 5` returns `true`
`==`	Equal to	`5 == 5` returns `true`
`!=`	Not equal to	`5 != 3` returns `true`

Control Flow

If Statements

let age = 18
if age >= 18 {
  print "Adult"
}

While Loops

let count = 5
while count > 0 {
  print count
  let count = count - 1
}

Functions

Functions are defined using the func keyword and support parameters and return values.

func add(a, b) {
  return a + b
}

let result = add(10, 20)
print result

Function Scope

Functions have their own local scope. Variables passed as arguments are local to the function.

func increment(x) {
  let x = x + 1
  return x
}

let value = 5
let newValue = increment(value)
print newValue  # Prints 6
print value     # Prints 5 (unchanged)

Comments

FlowLang currently does not support inline comments. Use descriptive variable and function names for self-documenting code.