orion-lang 0.1.0

Orion language interpreter.

Orion Language

Orion is a simple interpreted programming language, built for fun.

🔃 Installation

Install using pip:

pip install orion-lang

🛠️ Usage

Running it is easy:

orion <script.or>

ℹ️ Documentation

Variables

Variables can be declared with the var keyword

var x = 1;

Arrays must be declared with the array keyword

array x = [1, 2, 3, 4, 5];

Array methods

push() : pushes an element to the last index

x.push("a");
// [1, 2, 3, 4, 5, "a"]

or multiple elements:

x.push("a", "b", "c");
// [1, 2, 3, 4, 5, "a", "b", "c"]

pop() : removes the last element of an array

x.pop();
// [1, 2, 3, 4]

insert() : inserts an element at the specified index

x.insert(0, "abc");
// ["abc", 1, 2, 3, 4, 5]

delete() : deletes the specified index of an array (the outermost dimension)

x.delete(1);
// [1, 3, 4, 5]

Data types

null values can be assigned using the Nothing keyword:

var a = Nothing;

Functions may also return Nothing:

fn donothing():
    return Nothing;
end

Type conversion

Data types can also be converted.
int : converts to integer

var x = 3.0;
x = int(x); // 3

float : converts to float

var x = 3;
x = float(x); // 3.0

string : converts to string

var x = 3;
x = string(x); // "3"

Strings

Strings can also be concatenated.

var str = "Hello" + ", " + "World";
print(str);
// Hello, World

If statements

if (condition):
    // do
end

or

if (condition):
    // do
else if (condition):
    // do
else:
    // do
end

While statements

while (condition):
    // do
end

For loops

Examples:

// Example 1
for (var i = 0; i < 3; i++):
    print(i);
end

// Example 3
for (var i = 0; i < 3; i = i + 1):
    print(i);
end

Functions

Functions can be written with the fn keyword. You can also return values using return

fn add(a, b):
    return a + b;
end

Recursion is also supported:

fn factorial(n):
    if (n==1):
        return 1;
    end
    return n * factorial(n-1);
end

I/O

ask() : prompts the user for an input

var input = ask("name: ");

print() : prints a message into the terminal

print("Hello, world");

you can also print multiple items

print("Hello," "world");
// Hello, world

Termination

terminate() : exits the program