4.22 Analysing and Constructing Atoms
All Application Manual Name SummaryHelp

Availability:built-in
[ISO]atom_length(+Atom, -Length)
True if Atom is an atom of Length characters. The SWI-Prolog version accepts all atomic types, as well as code-lists and character-lists. See also write_size/4.
ClioPatria (version V3.1.1-59-g7b9a7a3)