# Builtins

This chapter covers builtin functions and classes in Syntek. The functions and classes are available in any file and do not need to be declared or imported.

# print

function print(obj: Object)

print outputs a string to console, stdout, or another target. The toString method is called on obj before printing it.

# range

# Sequence of numbers from 0 (inclusive) to "end" (exclusive)
function range(end: Number): Number[]

# Sequence of numbers from "start" (inclusive) to "end" (exclusive)
function range(start: Number, end: Number): Number[]

# Sequence of numbers from "start" (inclusive) to "end" (exclusive)
# with steps of "step"
function range(start: Number, end: Number, step: Number): Number[]

range returns an array of numbers. range can be called in 3 different ways. start is inclusive and end is exclusive. end must be greater than start and step must be greater than 0.

range(3) # [0, 1, 2]
range(7) # [0, 1, 2, 3, 4, 5, 6]

range(-5, 0) # [-5, -4, -3, -2, -1]
range(2, 7) # [2, 3, 4, 5, 6]

range(0, 10, 2) # [0, 2, 4, 6, 8]
range(5, 6, 3) # [5]

# Object

The Object class is the starting point for classes in Syntek. All classes implicitly extend Object.

class Object

# Number

class Number

# String

class String

# Boolean

class Boolean

# Optional

class Optional<T>

# Result

class Result<T, E extends Error>

# Array

class Array<T>

# Function

The Function class has a dynamic amount of generic parameters. The generics are the types of the parameters, with the last generic being the return type of the function.

class Function<T1, T2, Tn, TResult>

# VoidFunction

The VoidFunction class is similar to the Function class, but it does not produce a value.

class VoidFunction<T1, T2, Tn>

# Error

class Error

# Promise

class Promise<T>