Arrays
Arrays are lists of items that can be iterated over or passed to other tags. {[one;two;three]}
would create an array with 3 elements.
You can assign them to variables
{=myarray;{[one;two;three]}}
{$myarray}
{$myarray.0} // one
And you can iterate over them with {for}
{=target;{[one;two;three]}}
[#for;{=item};{$target}]
{$item}
[/for]
... which would print
one
two
three