plsql code for sum of odd number using for loop

declare

        n number;

        sum1 number default 0;

        endvalue number;

begin

        endvalue:=&endvalue;

        n:=1;

        for n in 1.. endvalue

        loop

             if mod(n,2)=1

             then

                  sum1:=sum1+n;

             end if

        end loop;

        dbms_output.put_line('sum = ' || sum1);

end;