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unifies the number of the characters of an atom.
atom_length(+Atom, -Number)
atom_length/2 unifies Number with the number of characters of Atom.
Arguments
Atom atom Number integer >= 0
Examples
| atom_length('this is quite a long text', N). | Succeeds with substitution N <- 25 |
| atom_length('four', 4). | Succeeds. |
| atom_length('five', 5). | Fails. |
Standard
This predicate is part of the ISO-Prolog Standard.
See also
atom_chars/2, atom_codes/2, atom_concat/3, atom_length/2, char_code/2, number_chars/2, number_codes/2, parse_atom/2/3, sub_atom/5.| document: http://www.ifcomputer.co.jp/MINERVA/Manual/Reference/Predicates/atomic_term/atom_length/print_de.html published 2008/11/17 update 1998/8/11 (c) 1996-2006 IF Computer Japan | ||||||||
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