{$map {a b} [$range 0 9] {
    {$+ $a $b}
}}

map receives a list of object names and a list, then repeatedly runs a list of statements with local named objects that specify the next items of the list. The return value of map is a list of values returned by all iterations of the loop.

If an iteration of the loop calls continue, its return value is ignored.

{$loop {
    {$stdout writeln a}
}}

loop repeatedly runs a list of statements.

{$range 1 5}

range returns a list of all whole numbers in a given range.