Welcome to JPL

About

JPL is a own little fun project. Here I code a own Programming Language with an Interpreter.

What can you do with it?

• variables (Strings, Numbers(Int/Float) and Lists)
• if statements (comparisons and locical operations)
• for/while loops (with break and continue)
• functions (with and without return)
• run code files(.jpl)

How do you start?

First, download the repository with git:git clone https://github.com/Ampferl/jpl.git You also need to download Python 3!

If everything is installed, you can go to the downloaded folder and enter python3 shell.py into the console. Or execute a program immediately: python3 shell.py example/functions.jpl

Now you can use the programming language!

For Example enter: print("Hello World")

Explanations:

Variables

var :identifier = :expr

If statements

You can use only if:

if(:expr){
    :statements
}

or with elif:

if(:expr){
    :statements
}elif(:expr){
    :statements
}

or also a else at the end:

if(:expr){
    :statements
}else{
    :statements
}

For/While Loops

For-Loops:

for(:start_value;:end_value[;:step]){
    :statements
}

For Example:

for(i=1;10){
    print(i)
}

While-Loops:

while(:expr){
    :statements
}

For Example:

var i = 0
while(i<=10){
    print(i)
    var i = i + 1
}

Also you can use a break or a continue!

Functions

function :func_name(:args){
    :statements
}

Also you can use a return!

Run Code Files

run(:path_to_file)

Some Extra Functions

I/O Functions

• print(expr)
• input()

Check expr Type

• is_number(expr)
• is_string(expr)
• is_list(expr)
• is_function(expr)

Lists

• append_l(list, value)
• pop_l(list, index)
• extend_l(listA, listB)
• len_l(list)
• get_l(list, index)
• set_l(list, index, string)
• split(string, separator)
• join(list, separator)
• search_l(list, search_string)

Math

• pow(base, exponent)
• mod(num, divisor)
• rand(start_value, end_value)
• pi()
• round(:number, :digits)
• cos(:number)
• sin(:number)
• tan(:number)

Formats

• int(:string)
• str(:number)
• float(:string/:number)
• hash(:string, :type) (Types: md5, sha1, sha256, sha512)

Date

• datetime()
• date()
• date_year()
• date_month()
• date_month_name()
• date_day()
• time()

String

• replace(string, replace_this, replacer)

File I/O

• read_file(:path) (output -> list)
• write_file(:path, :list, :append) (:append: true/false)

Resources

• The super tiny interpreter Tutorial
• Lets build a simple Interpreter
• Learn Programming by Morpheus Tutorial