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<a class="link" href="appendix-i-keywords.html">Appendix I: Keywords</a>
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<a class="link" href="appendix-ii-operators.html">Appendix II: Operators</a>
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<main>
<h1 class="main">Hello World</h1>
<div class="language-v">fn main() {
println('hello world')
}
</div>
<p>Save this snippet into a file named <code>hello.v</code>. Now do: <code>v run hello.v</code>.</p>
<blockquote class="tip">
<p>That is assuming you have symlinked your V with <code>v symlink</code>, as described
<a href="https://github.com/vlang/v/blob/master/README.md#symlinking">here</a>.
If you haven't yet, you have to type the path to V manually.</p>
</blockquote>
<p>Congratulations - you just wrote and executed your first V program!</p>
<p>You can compile a program without execution with <code>v hello.v</code>.
See <code>v help</code> for all supported commands.</p>
<p>From the example above, you can see that functions are declared with the <code>fn</code> keyword.
The return type is specified after the function name.
In this case <code>main</code> doesn't return anything, so there is no return type.</p>
<p>As in many other languages (such as C, Go, and Rust), <code>main</code> is the entry point of your program.</p>
<p><a href="builtin-functions.html#println"><code>println</code></a> is one of the few <a href="builtin-functions.html">built-in functions</a>.
It prints the value passed to it to standard output.</p>
<p><code>fn main()</code> declaration can be skipped in one file programs.
This is useful when writing small programs, "scripts", or just learning the language.
For brevity, <code>fn main()</code> will be skipped in this tutorial.</p>
<p>This means that a "hello world" program in V is as simple as</p>
<div class="language-v">println('hello world')
</div>
<blockquote class="tip">
<p>[!NOTE]
If you do not explicitly use <code>fn main() {}</code>, you need to make sure that all your
declarations come before any variable assignment statements or top level function calls,
since V will consider everything after the first assignment/function call as part of your
implicit main function.</p>
</blockquote>
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