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Roc

Roc

Roc is a fast, friendly, functional language.

Master Roc with
Interactive Learning

Elevate your Roc skills through 110 curated exercises across 0 core concepts. Master problem-solving with a structured learning path designed for modern developers.

Roc

About Roc

Roc is a modern, fast, and safe programming language designed for building reliable software with simplicity in mind. With an emphasis on performance and minimalism, Roc brings a fresh perspective to the world of functional programming, aiming to make it accessible and efficient for developers.

Main Features

  • Simplicity and Safety: Roc is designed to reduce common programming errors through its type system and by enforcing immutability by default, which leads to more predictable and maintainable code.
  • Optimized Performance: Roc's compiler is built to generate highly optimized machine code, ensuring that applications run fast and efficiently.
  • No Nonsense Dependencies: Roc encourages simplicity not just in code, but also in dependency management, aiming for minimal external dependencies.
  • Clean Syntax: Roc's syntax is straightforward and easy to read, drawing inspiration from modern functional languages while stripping away unnecessary complexity.
  • Interoperability: Roc is built to work well with other languages, making it easier to integrate into existing projects.

For more details, visit roc-lang.org.

Key Features of Roc

Fast

Roc code is designed to build fast and run fast. It compiles to machine code or WebAssembly.

Functional

Roc has a small number of simple language primitives. It's a single-paradigm functional language.

Friendly

Roc's syntax, semantics, and included toolset all prioritize user-friendliness.

Safe

Roc's powerful type system and immutability lead to more predictable and maintainable code.

Interoperable

Roc works well with other languages, making it easier to integrate into existing projects.

Evolving

Roc is a young language, and it is evolving fast.

Track icon

Fast

Roc code is designed to build fast and run fast. It compiles to machine code or WebAssembly.

Functional

Roc has a small number of simple language primitives. It's a single-paradigm functional language.

Friendly

Roc's syntax, semantics, and included toolset all prioritize user-friendliness.

Safe

Roc's powerful type system and immutability lead to more predictable and maintainable code.

Interoperable

Roc works well with other languages, making it easier to integrate into existing projects.

Evolving

Roc is a young language, and it is evolving fast.

Dive into Roc practice challenges

Hello World
Hello World
Level 1

SlaveCode's classic introductory exercise. Just say "Hello, World!".

High Scores
High Scores
Level 1

Manage a player's High Score list.

Leap
Leap
Level 1

Determine whether a given year is a leap year.

Raindrops
Raindrops
Level 1

Convert a number into its corresponding raindrop sounds - Pling, Plang and Plong.

Resistor Color
Resistor Color
Level 1

Convert a resistor band's color to its numeric representation.

Two-Fer
Two-Fer
Level 1

Create a sentence of the form "One for X, one for me.".