C3 – A C alternative that looks like C

In plain words

C3 is a programming language designed as an alternative to C with a familiar syntax. Launched in 2021, it aims to provide developers who work with C a new option that maintains the language's recognizable style while presumably offering different features or improvements. The project is hosted on GitHub for developers interested in exploring or contributing to this C-inspired language.

written from the facts on this page · September 2026

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  C3 – A C alternative that looks like C2022 · ▲182

  Compiler link: https://github.com/c3lang/c3c Docs: http://www.c3-lang.org This is my follow-up "Show HN" from roughly a year ago (https://news.ycombinator.com/item?id=27876570). Since then the language design has evolved and the compiler has gotten much more solid. Assorted extra info: - The C3 name is a homage to the C2 language project (http://c2lang.org) which it was originally inspired by. - Although C3 mostly conforms to C syntax, the most obvious change is requiring `fn` in front of the functions. This is to simplify searching for…

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  The C3 programming language (C alternative language)2025 · github.com · ▲175

  Get it from here: https://github.com/c3lang/c3c In 2019, while contributing to the C2 language, I started up "C3" as a pet project while waiting for pull requests to be approved... Now it's 6 years later and C3 well on its way to 1.0, having released 0.7.0 last week. Unlike other C alternatives, C3 tries to evolve C – but without concern to backwards compatibility to the latter. What it adds to C is among other things: - Module system - Semantic macros and compile time introspection - Lightweight generic modules - Zero overhead errors - Build-in slices and SIMD types -…

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