PL/SQL program to find sum of digits of a number

write a pl/sql program to print the sum of numbers from 1 to 100 :

Code

Declare
Var1 integer;
Var2 integer;
Var3 integer;
Begin
Var1:= :var1; --Please remember In some compiler it can be "&" for example &N.
Var2:= :var2; --Please remember In some compiler it can be "&" for example &N.
Var3:=var1+var2;
Dbms_output.put_line('the sum of number is'||var3);
End;
/
  

output

the sum of number is48

Statement processed.