The V Programming Language

[vlang.io](https://vlang.io) | [Docs](https://vlang.io/docs) | [Changelog](https://github.com/vlang/v/blob/master/CHANGELOG.md) | [Speed](https://fast.vlang.io/)

[![Build Status](https://github.com/vlang/v/workflows/CI/badge.svg)](https://github.com/vlang/v/commits/master) [![Sponsor](https://camo.githubusercontent.com/da8bc40db5ed31e4b12660245535b5db67aa03ce/68747470733a2f2f696d672e736869656c64732e696f2f7374617469632f76313f6c6162656c3d53706f6e736f72266d6573736167653d254532253944254134266c6f676f3d476974487562)](https://github.com/sponsors/medvednikov)

[![Twitter handle][]][Twitter badge] [![Discord](https://img.shields.io/discord/592103645835821068?label=Discord)](https://discord.gg/vlang)

## Key Features of V - Simplicity: the language can be learned in less than an hour - Fast compilation: ≈100k — 1.2 million loc/s - Easy to develop: V compiles itself in less than a second - Performance: within 3% of C - Safety: no null, no globals, no undefined behavior, immutability by default - C to V translation - Hot code reloading - [Cross-platform UI library](https://github.com/vlang/ui) - Built-in graphics library - Easy cross compilation - REPL - Built-in ORM - C and JavaScript backends A stable 0.2 release is planned for April 2020. Right now V is in an alpha stage. ## Installing V from source ### Linux, macOS, Windows, *BSD, Solaris, WSL, Android, Raspbian ```bash git clone https://github.com/vlang/v cd v make ``` That's it! Now you have a V executable at `[path to V repo]/v`. `[path to V repo]` can be anywhere. (On Windows `make` means running `make.bat`, so make sure you use `cmd.exe`.) V is being constantly updated. To update V, simply run: ``` v up ``` ### C compiler You'll need Clang or GCC or Visual Studio. If you are doing development, you most likely already have one of those installed. Otherwise, follow these instructions: - [Installing a C compiler on Linux and macOS](https://github.com/vlang/v/wiki/Installing-a-C-compiler-on-Linux-and-macOS) - [Installing a C compiler on Windows](https://github.com/vlang/v/wiki/Installing-a-C-compiler-on-Windows) ### Symlinking You can create a `/usr/local/bin/v` symlink so that V is globally available: ```bash sudo ./v symlink ``` ### Docker

Expand Docker instructions

```bash git clone https://github.com/vlang/v cd v docker build -t vlang . docker run --rm -it vlang:latest v ``` ### Docker with Alpine/musl: ```bash git clone https://github.com/vlang/v cd v docker build -t vlang --file=Dockerfile.alpine . docker run --rm -it vlang:latest /usr/local/v/v ```

### Testing and running the examples Make sure V can compile itself: ``` v -o v2 cmd/v ``` ```bash $ v V 0.1.x Use Ctrl-C or `exit` to exit >>> println('hello world') hello world >>> ``` ```bash cd examples v hello_world.v && ./hello_world # or simply v run hello_world.v # this builds the program and runs it right away v word_counter.v && ./word_counter cinderella.txt v run news_fetcher.v v run tetris/tetris.v ```

In order to build Tetris and anything else using the graphics module, you will need to install glfw and freetype libraries. If you plan to use the http package, you also need to install OpenSSL on non-Windows systems. ``` macOS: brew install glfw freetype openssl Debian/Ubuntu: sudo apt install libglfw3 libglfw3-dev libfreetype6-dev libssl-dev Arch/Manjaro: sudo pacman -S glfw-x11 freetype2 Fedora: sudo dnf install glfw glfw-devel freetype-devel Windows: git clone --depth=1 https://github.com/ubawurinna/freetype-windows-binaries [path to v repo]/thirdparty/freetype/ ``` glfw dependency will be removed soon. ## V UI

https://github.com/vlang/ui ## Troubleshooting https://github.com/vlang/v/wiki/Troubleshooting ## Contributing Code structure: https://github.com/vlang/v/blob/master/CONTRIBUTING.md If you introduce a breaking change and rebuild V, you will no longer be able to use V to build itself. So it's a good idea to make a backup copy of a working compiler executable. [Twitter handle]: https://img.shields.io/twitter/follow/v_language.svg?style=social&label=Follow [Twitter badge]: https://twitter.com/v_language