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<div align="center"> <p> <img width="80" src="https://raw.githubusercontent.com/vlang/v-logo/master/dist/v-logo.svg?sanitize=true"> </p> <h1>The V Programming Language</h1>

vlang.io | Docs | Changelog | Speed | Contributing & compiler design

</div> <div align="center">

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Key Features of V

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 vfmt, as has been done in the past.

The V core APIs (primarily the os module) will still have minor changes until they are stabilized in V 1.0. Of course the APIs will grow after that, but without breaking existing code.

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 (preferred method)

Linux, macOS, Windows, *BSD, Solaris, WSL, Android, etc.

Usually installing V is quite simple if you have an environment that already has a functional git installation.

To get started, simply try to execute the following in your terminal/shell:

git clone https://github.com/vlang/v
cd v
make
# HINT: Using Windows?: run make.bat in the cmd.exe shell

That should be it and you should find your V executable at [path to V repo]/v. [path to V repo] can be anywhere.

(As in the hint above, on Windows make means running make.bat, so make sure you use the cmd.exe terminal.)

Now you can try ./v run examples/hello_world.v (v.exe on Windows).

V is constantly being updated. To update V, simply run:

v up

C compiler

It's recommended to use Clang, GCC, or Visual Studio. If you are doing development, you most likely already have one of those installed.

Otherwise, follow these instructions:

However, if none is found when running make on Linux or Windows, TCC is downloaded as the default C backend. It's very lightweight (several MB) so this shouldn't take too long.

Symlinking

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 every time. V provides a convenience v symlink command to do that more easily.

On Unix systems, it creates a /usr/local/bin/v symlink to your executable. To do that, run:

sudo ./v symlink

On Windows, start a new shell with administrative privileges, for example by <kbd>Windows Key</kbd>, 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:

.\v.exe symlink

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 v up, restarts, and so on. You only need to run it again, if you decide to move the V repo folder somewhere else.

Docker

<details><summary>Expand Docker instructions</summary>

git clone https://github.com/vlang/v
cd v
docker build -t vlang .
docker run --rm -it vlang:latest

Docker with Alpine/musl

git clone https://github.com/vlang/v
cd v
docker build -t vlang --file=Dockerfile.alpine .
docker run --rm -it vlang:latest

</details>

Testing and running the examples

Make sure V can compile itself:

v self
$ v
V 0.2.x
Use Ctrl-C or `exit` to exit

&gt;&gt;&gt; println('hello world')
hello world
&gt;&gt;&gt;
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 run word_counter/word_counter.v word_counter/cinderella.txt
v run news_fetcher.v
v run tetris/tetris.v

<img src='https://raw.githubusercontent.com/vlang/v/master/examples/tetris/screenshot.png' width=300>

NB: In order to build Tetris or 2048 (or anything else using sokol or gg graphics modules) on some Linux systems, you need to install libxi-dev and libxcursor-dev .

V net.http, net.websocket, v install

If you plan to use the net.http module, or the net.websocket module, you also need to install OpenSSL on non-Windows systems:

macOS:
brew install openssl

Debian/Ubuntu:
sudo apt install libssl-dev

Arch/Manjaro:
openssl is installed by default

Fedora:
sudo dnf install openssl-devel

V sync

V's sync module and channel implementation uses libatomic. It is most likely already installed on your system, but if not, you can install it, by doing the following:

MacOS: already installed

Debian/Ubuntu:
sudo apt install libatomic1

Fedora/CentOS/RH:
sudo dnf install libatomic-static

V UI

<a href="https://github.com/vlang/ui"> <img src='https://raw.githubusercontent.com/vlang/ui/master/examples/screenshot.png' width=712> </a>

https://github.com/vlang/ui

<!---

JavaScript backend

examples/hello_v_js.v:

fn main() {
    for i in 0 .. 3 {
        println('Hello from V.js')
    }
}
v -o hi.js examples/hello_v_js.v && node hi.js
Hello from V.js
Hello from V.js
Hello from V.js

-->

Android graphical apps

With V's vab tool, building V UI and graphical apps for Android can become as easy as:

./vab /path/to/v/examples/2048

https://github.com/vlang/vab.

<img src="https://user-images.githubusercontent.com/768942/107622846-c13f3900-6c58-11eb-8a66-55db12979b73.png">

Developing web applications

Check out the Building a simple web blog tutorial and Gitly, a light and fast alternative to GitHub/GitLab:

https://github.com/vlang/gitly

<img src="https://user-images.githubusercontent.com/687996/85933714-b195fe80-b8da-11ea-9ddd-09cadc2103e4.png">

Vinix, an OS/kernel written in V

V is great for writing low-level software like drivers and kernels. Vinix is an OS/kernel that already runs bash, GCC, V, and nano.

https://github.com/vlang/vinix

<img src="https://github.com/vlang/vinix/raw/main/screenshot.png?raw=true">

Acknowledgement

V thanks Fabrice Bellard for his original work on the TCC - Tiny C Compiler. Note the TCC website is old; the current TCC repository can be found here. V utilizes pre-built TCC binaries located at https://github.com/vlang/tccbin/.

Troubleshooting

Please see the Troubleshooting section on our wiki page