README.md

jesse

A programming language for meth heads

Description

Do you love programming? Are you a Breaking Bad fan? You will love jesse.

jesse is an adaptation of the Lox programming language from the book Crafting Interpreters. jesse is almost identical to Lox in structure but makes use of Breaking Bad references as keywords and is implemented in Python.

Installation

• Clone the repo

git clone https://github.com/AkshayWarrier/jesse
cd jesse

• Find the jesse script in the folder and make it an executable

chmod u+x jesse

• Create .jesse file and run it using the script

./jesse Example.jesse

Documentation

Print Statement

Let's start with printing something on to the screen. To print "heisenberg" on to the screen use

say my name "heisenberg";

All statements have to end with a ; otherwise jesse won't be very happy. A syntax error gets thrown

yeah mr white! yeah science!
say my name "heisenberg"
                        ^
[Error 1] mr white where's my semicolon yo?

Variables and Data Types

jesse has a few datatypes one which you have already seen i.e strings. jesse also has another datatype which is uh meth. Meth is always weighed in grams, therefore all meth quantities must be appended with "gm". Now let's try creating some variables that store meth. To do so use the keyword cook

cook meth1 = 5gm;
cook meth2 = 10gm;
cook meth3 = 2.5gm;

say my name (meth1*meth2) + meth3;

Like you would expect, you can perform all your favourite arthmetic operations on meth.

Null values can be pretty dangerous sometimes therefore they are aptly called i am the danger. jesse also supports booleans which are denoted by cartel and dea for true and false values respectively.

// Sets meth to i am the danger
cook meth;

// Prints cartel
say my name dea or cartel;

Control Flow

jesse supports if else conditions which is almost identical to other languages

cook meth = 1000gm;

jesse if (meth >= 1000gm) {
    say my name "We are rich baby!";
} else {
    say my name "We need to cook more meth!";
}

On the topic of conditionals, jesse also allows for ternary expressions like some languages

cook my_meth = 5gm;

say my name (my_meth > 5gm) ? "More than 5gm of meth" 
                            : "Less than 5gm of meth";

jesse supports while loops. To create a while loop use the one who knocks keyword. Here's a little program that creates a factorial amount of meth using while loops

cook fact_meth = 1gm;
cook n_meth = 5gm;

the one who knocks (n_meth) {
    fact_meth = fact_meth*n_meth;
    n_meth = n_meth - 1gm;
}

say my name fact_meth;

I was too lazy to implement for loops

Functions

To define a function, use the better call keyword like so

better call saul (){
    say my name "Saul Goodman speedy justice for you!";
}
// Call function
saul();

Like in any language, functions may or may not have return values and can take additional parameters as input to the function

better call sum(a, b) {
    return (a + b);
}

say my name sum(1gm, 2gm);

And what are functions without recursion? Here's a program to produce fibonacci amounts of meth

better call fibo(n) {
    jesse if (n == 0gm or n == 1gm) return 1gm;
    return fibo(n - 1gm) + fibo(n - 2gm);
}

say my name fibo(5gm);