Native Functions

Introduction

Functions contain a block of code that perform a specific task

There are two types of functions in Dark Elixir

There are some functions that are built into Dark Elixir natively

input(prompt)

Asks the user for input

> x = input("What's your name: ")
What's your name:
Steve
> x
"Steve"

print(value)

Prints the value on the screen

> print("Hello, World")
Hello, World

date()

Prints the current date on the screen

> date()
Fri Jul 14 00:41:20 IST 2023

is_boolean(value)

Returns true if the value is a boolean and false if it is not a boolean

> is_boolean(false)
true

is_atom(value)

Returns true if the value is an atom and false if it is not an atom

> is_atom(:hello)
true

is_number(value)

Returns true if the value is a number and false if it is not a number

> is_number(70)
true

is_list(value)

Returns true if the value is a list and false if it is not a list

> is_list([1, 2, 3])
true

is_tuple(value)

Returns true if the value is tuple and false if it is not a tuple

> is_tuple({1, 2, 3})
true

len(value)

Takes a string, map, tuple or list and returns its size

> len("Hello, World")
12