find letter series {a , bc, def, ghij, klmno __________________________ a-z}

Is that a real use case or just a coding challenge?

This is challenge..our requirement..this logic is possible in our appini

I tried but i didn't get exact result

what exactly you are looking for. Only the count of charaters in a string? if yes, then you can use len() function.

I want above letter series

a!forEach(
  items: enumerate(8),
  expression: joinarray(
    a!forEach(
      items: enumerate(fv!index) + sum(enumerate(fv!index)) + 1,
      expression: index(
        "abcdefghijklmnopqrstuvwxyz",
        fv!item,
        {}
      )
    )
  )
)

thank you