The Jam Programming Language

An open source programming language that combines the expressiveness of dynamic languages with a powerful static type system for native efficiency.

# Compute the average line length from stdin
lines = io.stdin.lines()

if lines.length > 0
  average = lines.map($length).sum() / lines.length
else
  average = 0
end

puts("Average line length: #{average}")

Note

The above example is not yet fully supported by the language

Features

Strong, static duck-typing, with optional type annotations
Common value semantics between values and types
Fast compiling* to efficient native code
Non-restrictive towards programming paradigms
Powerful meta-programming concepts ( Compile-time evaluation, meta-classes*)
First order dependent types*
Efficient C bindings*

* Some features are yet to be implemented, please see the roadmap for development details.

Open Source

Jam is licensed under MIT, giving everyone the freedom to do what they want to do with the language. Contributions on Github are always welcome.