Hello world

A wee bit more than just that.

Code

use { Vessel } from ksp::vessel
use { CONSOLE } from ksp::console

pub fn main_flight(vessel: Vessel) -> Unit = {
    CONSOLE.clear()
    CONSOLE.print_line("Hello world: " + vessel.name)
}

Annotated

use { Vessel } from ksp::vessel

Import the Vessel type from the builtin ksp::vessel module.
The Vessel type contains many properties and methods to interact with a vessel in the game
Please to not interact with Kerbals this way
- … I mean … you potentially could, but it is probably not very nice

use { CONSOLE } from ksp::console

Import the CONSOLE type from the builtin ksp::console module.

pub fn main_flight(vessel: Vessel) -> Unit = {

The entrypoint for flight-mode, i.e. the script will appear on the main window if the game is in flight-mode
vessel will be a reference to the currently active vessel

    CONSOLE.clear()

Clear the console

    CONSOLE.print_line("Hello world:" + vessel.name)

Will print “Hello world:” followed by the name of the active vessel