This method uses SubStringCount()
along with SubField()
to be able to individually iterate over a list with Qlik Loops - For Loop
This is a work-around within Qlik without having a list object to store multiple strings
set values='a,b,c';
let commaCount=SubStringCount(values,',');
for i=1 to commaCount + 1
let value=subfield(values,',', i);
next