Examples

Here you can check out some examples that will hopefully help you understand the language and what you can and can't do with it.

Fibonacci Numbers

$function load() {
    # Setup variables
    $running = 1  
    $timer = 0
    $ffib = 1
    $sfib = 1
    $temp = 0
}

$function tick() {
    $if ($running == 1) {
        $timer++                            # Increment `$timer` by one each tick
        $if(($timer % 20) == 0) {           # Check if one second has passed
            $print($ffib | dark_purple)     # Print the next number in the sequence
            $temp = $sfib 
            $sfib += $ffib
            $ffib = $temp
        }
    }
}

$function stop() $running = 0  # Disable the `tick` function

How it looks in-game:

Display a player's x position on the sidebar

$function load() {
    $posx = 0
    $setdisplay($posx, sidebar)
}

$function tick() {
    $posx = $pos("@p", 0)
}

Using functions with arguments

$function load() {
    $n1 = 3
    $n2 = 5
    $print($add($n1, $n2))
}

$function add($x, $y) {
    $return($x + $y)
}

This will print out the expected result 8 when the datapack is loaded.