Sum of 100 odd numbers using While loop

Sum of 100 odd numbers using While loop

  declare
  n number;
  endvalue number;
  sum1 number default 0;
  begin
  endvalue:=&endvalue;
  n:=1;
  while(n<endvalue)
  loop
 sum1:=sum1+n;
 n:=n+2;
 end loop;
 dbms_output.put_line('Sum of Odd numbers between 1 and '|| endvalue   ||'  is '||sum1);
 end;
 /

Enter value for endvalue: 30
old   endvalue:=&endvalue;
new   endvalue:=30;
Sum of Odd numbers between 1 and 30  is 225