Modulo:Sandbox/ValterVB/ISSN

local p = {}
-- nb/2010/16426 
-- nb2010016426
function p.ISSN(frame)
    id=frame.args.id
    result=8*string.sub (id, 5 , 6)+7*string.sub (id, 5 , 6)+6*string.sub (id, 5 , 6)+5*string.sub (id, 5 , 6)+4*string.sub (id, 5 , 6)+3*string.sub (id, 5 , 6)+2*string.sub (id, 5 , 6)
    result=11-result % 11
    return result
end
 
return p