# Hello, world

> The smallest Langoost program — declare a variable and print a greeting with string concatenation.

# Hello, world

Strings are joined with `+`, and `print` writes a line to stdout.

```goost
let name: string = "world"
print("Hello, " + name + "!")
```

Run it:

```
$ langoost run hello.goost
Hello, world!
```