I have a string "a,b,c" I want to convert that to array of string.
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a!localvariables( local!string: "a,b,c", local!split: split(local!string, ","), local!split)
There is a great resource in the Appian documentation that lists all Appian functions:
docs.appian.com/.../Appian_Functions.html
I was about to edit and suggest that as well