Arrays and/or Lists are very common in programming languages. In Qlik scripting there are two ways to go about creating an array of sorts.

The first way is storing a list in a variable:

 
SET vCount = 'One','Two','Three';

for each i in $(vCount)

    Trace ------------ $(i);

Next i

The second way is by using a field:

 Cnt:
Load * Inline[
Cnt
One
Two
Three
];

For each x in FieldValueList('Cnt');

    Trace ------------ $(x);

Next x

The main use of these will be for iterating over their values. There are not any native list/array operations, however you can get around that utilizing other Qlik functions. For example: concatenate, where not exists, reinitializing the variable, etc…