Not shown result

Question

declare
a number(10):=2;
b number(10):=2;
c number(10);
begin
--c := a**b;
c:=power(a,b);
dbms_output.put_line(c);
c:=c+power(c,c);
dbms_output.put_line(c);
end;
why it not showing output but executed sucessfully.
same code showing result in apex

Answer 1

I've tested your code and it gave correctly the output. When you want to view the output in SQL Developer, you have to go to view --> Dbms output. Then you get a region where you can click on the green plus sign and add dbms output for the connection that you've got.