char(20) = 'name'
varchar2(20)='name'
When comparing these two values, are the spaces padded in char are considered or not? Are both values equal?

In Char type spaces will be padded after 'name' uptp max length 20.
in Varchar spaces will not be padded.

While comparing a char value to a Varchar spaces will be counted so your example fails

Regards
Mala

Spaces will pad, both value will be different, Use this procedure your doubt will be clear

create or
replace procedure test2
as

   x varchar(20):='sudhir';

   y char(20):='sudhir';


   begin

   if(x=y) then

     dbms_output.put_line('both are equal');


   else

     dbms_output.put_line('both are not equal');


   end
if;

end;

You can check it using the following procedure

create or replace procedure test as

v_name1  char(20) := 'name';
v_name2  varchar2(20) := 'name';

begin

if v_name1 = v_name2 then
dbms_output.put_line('Both the words are same');
else
dbms_output.put_line('Both the words are different');
end if;
end;

The output is
Both the words are different.

if rtrim(v_name1) = v_name2 then

if you use rtrim for char data it will diplay the message
two words are same.

This is because
Char is a fixed length datatype and values are padded with blank spaces to match specified length.
Varchar2 is variable length datatype.

ans is both values are not equal  char(20)='name' covered in memorey areea is 20 but varchar2(20)='name' covered in memorey areea is 4 becoze char is fixed lenth char data type but varchar2 is variable lenth char data type

Spaces will be padded with y variable,its means y will store y='sudhir              ' . while x only store 6 six character so both string will not be equal

create or replace procedure test2 as
   x varchar(20):='sudhir';
   y char(20):='sudhir';
   begin
   if(x=y) then
     dbms_output.put_line('both are equal');
   else
     dbms_output.put_line('both are not equal');
   end if;
end;