Revision as of 19:15, 9 May 2022 (view source) Depperm (talk \| contribs) No edit summary ← Older edit		Revision as of 14:35, 4 July 2022 (view source) Drkameleon (talk \| contribs) m (→‎{{header\|Arturo}}) Newer edit →
Line 648: <lang rebol>validISBN?: function [isbn][ currentCheck: to :integer to :string last isbn isbn: map split chop replace isbn "-" "" ='d -> [to :integer] d s: 0

ISBN13 check digit (view source)