auto increment in sql

Question

if id column has values (1,2,3,4,5,...10)
and i insert value 20 for id ,what is the value of new id that i insert?
is it 20 or 11?

Answer 1

20 still
but if you dont specify the value it will automate to 11

Answer 2

now if i nsert without specifying it,is the value of it 21 or 11?