Which Italian abbreviation is correct Nº, No. or n.
Which abbreviation for the number in Italian is correct: Nº, No., n., ...
I think that Nº is the right one, but on the other hand I can see that Italians use Nº and n. at the same time. I don't understand why. It shouldn't be allowed both forms?

Can be written "Nº" also in the middle of the sentence or it even must be written so.

Question

Which Italian abbreviation is correct Nº, No. or n.
Which abbreviation for the number in Italian is correct: Nº, No., n., ...
I think that Nº is the right one, but on the other hand I can see that Italians use Nº and n. at the same time. I don't understand why. It shouldn't be allowed both forms?

Can be written "Nº" also in the middle of the sentence or it even must be written so.

Answer

you are right   
  n°    0k                                                via  Verdi  n°   36    cap    30173   Mestre
 mail  now                                            via Verdi,  36          cap     30173   Mestre    (VE)       
 
some people  write  N° ,   nr