The V Programming Language[vlang.io](https://vlang.io) | [Docs](https://github.com/vlang/v/blob/master/doc/docs.md) | [Changelog](https://github.com/vlang/v/blob/master/CHANGELOG.md) | [Speed](https://fast.vlang.io/) | [Contributing](https://github.com/vlang/v/blob/master/CONTRIBUTING.md)
Key Features of V
- Simplicity: the language can be learned in less than an hour
- Fast compilation: ≈80k loc/s with a Clang backend, ≈1 million loc/s with x64 and tcc backends (Intel i5-7500, SSD, no optimization)
- 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
- Built-in graphics library
- Easy cross compilation
- Built-in ORM
Stability guarantee and future changes
Despite being at an early development stage, the V language is relatively stable and has backwards compatibility guarantee, meaning that the code you write today is guaranteed to work a month, a year, or five years from now.
There still may be minor syntax changes before the 1.0 release,
but they will be handled automatically via
has been done in the past.
The V core APIs (primarily the
os module) will
still have minor changes until they are stabilized in 2020. Of
course the APIs will grow after that, but without breaking existing
Unlike many other languages, V is not going to be always changing, with new features being introduced and old features modified. It is always going to be a small and simple language, very similar to the way it is right now.
Installing V from source
Linux, macOS, Windows, *BSD, Solaris, WSL, Android, Raspbian
git clone https://github.com/vlang/v cd v make
That's it! Now you have a V executable at
[path to V
[path to V repo] can be anywhere.
make means running
make.bat, so make sure you use
Now you can try
./v run examples/hello_world.v
v.exe on Windows).
V is being constantly updated. To update V, simply run:
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:
NB: it is highly recommended, that you put V on your
PATH. That saves you the effort to type in the full path to your v
executable everytime. V provides a convenience
symlink command to do that more easily.
On Unix systems, it creates a
symlink to your executable. To do that, run:
sudo ./v symlink
On Windows, start a new shell with administrative privileges,
for example by Windows Key, then type
cmd.exe, right click on its menu entry, and choose
Run as administrator. In the new administrative shell,
cd to the path, where you have compiled v.exe, then type:
That will make v available everywhere, by adding it to your PATH. Please restart your shell/editor after that, so that it can pick the new PATH variable.
NB: there is no need to run
v symlink more than
once - v will continue to be available, even after
up, restarts and so on. You only need to run it again, if
you decide to move the V repo folder somewhere else.
DockerExpand 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
$ v V 0.1.x Use Ctrl-C or `exit` to exit >>> println('hello world') hello world >>>
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 on non-Windows systems, you will need to install freetype libraries.
If you plan to use the http package, you also need to install OpenSSL on non-Windows systems.
macOS: brew install freetype openssl Debian/Ubuntu: sudo apt install libfreetype6-dev libssl-dev Arch/Manjaro: sudo pacman -S freetype2 Fedora: sudo dnf install freetype-devel
Developing web applications
Check out the Building a simple web blog tutorial and Gitly, a light and fast alternative to GitHub/GitLab:
Please see the Troubleshooting section on our wiki page