Jam: A Friendly, Expressive Language for All Developers

Jam is a beginner-friendly programming language with a readable, English-like syntax. Designed to be simple enough for newcomers and powerful enough for professionals. Try out Jam instantly in the online web-based IDE

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Table of Contents

• Why Jam?
• Quick Start
• Your First Jam Program
• Language Guide
  • Variables
  • Control Flow
  • Loops
  • Functions
  • Operations
  • Utilities
• Architecture
• Vision
• Contributing
• Areas We Need Help With
• Development Setup
• License
• Acknowledgments
• Support

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Why Jam?

For Beginners

• Intuitive Syntax — English-like commands that make sense right away
• Beginner-Friendly Learning Curve — No complex symbols or obscure syntax
• Interactive Feedback — Built-in interpreter for immediate results
• Helpful Guidance — Get warnings and tips as you learn

For Professionals

• Type Inference — Smart type detection and warning system
• Modern Features — Functions, lambdas, maps, timers, and more
• Extensible Architecture — Easily add new features or tools

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Quick Start

Start right now by visiting the Jam's IDE

Your First Jam Program

Create a file called hello.jam:

# Welcome to Jam!
say "Hello, World!"

Run with the Jam interpreter:

python jam.py hello.jam

Language Guide

Variables

set message = "Hello Jam!"
set count = 42
set pi = 3.14159
set is_active = true
set numbers = [1, 2, 3, 4, 5]

Control Flow

# Basic variable assignment and arithmetic
set x = 10
set y = 5
set name = "Alice"

# Conditional logic
if x > y {
    print "x is greater than y"
} else if x < y {
    print "x is less than y"
} else {
    print "x equals y"
}

Loops

repeat 5 {
    print "This will print 5 times"
}

Functions

Named function:

function greet (name) {
    add "Hello, " and name into message
    print message
    return message
}

Anonymous function (lambda):

function anonymous (x, y) {
    add x and y into result
    return result
}

Calling functions:

call greet("World")
set sum_result = call anonymous(5, 7)
print sum_result

Operations

Math operations:

# Basic arithmetic
set a = 15
set b = 3

add a and b into sum
print sum

multiply a and b into product
print product

# Math functions
square of a into a_squared
print a_squared

sqrt of 64 into root
print root

# Random numbers
random between 1 and 100 into lucky_number
print lucky_number

String operations:

set message = "hello world"

uppercase message into upper_msg
print upper_msg

lowercase message into lower_msg
print lower_msg

reverse message into reversed_msg
print reversed_msg

# String concatenation
set first = "Hello"
set last = "World"
add first and " " into temp
add temp and last into greeting
print greeting

List operations:

# Array creation and manipulation
set numbers = [1, 2, 3, 4, 5]
set names = ["Alice", "Bob", "Charlie"]

length of numbers into count
print count

# Map function
set doubled = map (n) => n * 2 over numbers
print doubled

set greetings = map (name) => "Hello " + name over names
print greetings

Map (transform array):

set doubled = map (n) => n * 2 over numbers

Utilities

Timing execution:

# Performance timing
timer start

repeat 1000 {
    set x = 1 + 1
}

timer stop

Random values:

# Random selection
choose from rock, paper, scissors into choice
print choice

User input:

# Getting user input
ask "What is your name?" and store in user_name
add "Hello, " and user_name into welcome_message
print welcome_message

ask "Enter first number:" into num1
ask "Enter second number:" into num2
add num1 and num2 into total
print total

Architecture

Jam is built with an Interpreter:

• It runs Jam directly in Python for quick testing

Jam used to have dual architecture. However for faster development and educational focus, the compiler was sunsetted in v2.0.0

Core Components:

• Parser — Converts Jam syntax into an abstract syntax tree
• Type System — Provides inference and developer-friendly warnings
• Standard Library — Built-in support for common operations

Vision

Jam aims to be the most approachable language without sacrificing power or extensibility.

Roadmap

• Package manager for Jam modules
• Optional static type annotations
• Debugger and developer tools
• Expanded standard library
• Performance improvements

Contributing

We welcome developers of all skill levels! Start contributing in just a few steps:

• Fork the repository
• Create a feature branch

 git checkout -b feature/my-feature

• Commit your changes

 git commit -m "Add my feature"

• Push to GitHub

 git push origin feature/my-feature

• Open a Pull Request

Please see the CONTRIBUTING.md and CODE_OF_CONDUCT.md

Areas We Need Help With

• Language design and syntax ideas
• Documentation and tutorials
• Standard library development
• Editor tooling and plugins
• Test coverage and edge cases

Development Setup

# Clone your fork
git clone https://github.com/UnitaryIron/Jam-Backend.git
cd Jam-Backend

# Run tests
python test_jam.py

Documentation build instructions coming soon.

License

This project is licensed under the MIT License .

Acknowledgments

• Inspired by educational languages like Scratch, Python, and BASIC
• Created to make programming more accessible and expressive

Thanks to all contributors

Support

• Documentation: Coming soon
• Issues: GitHub Issues
• Discussions: GitHub Discussions
• Email: em.lijo@outlook.com