(* Pascal *)
   if a > b then
   begin
       blah;
       blah;
   end
   else
   begin
       blah;
       blah;
   end;

   -- Ada
   if a > b then
       blah;
       blah;
   else
       blah;
       blah;
   end if;

   // C
   if (a > b) {
       blah();
       blah();
   } else {
       blah(); 
       blah();
   }

That said I think that punctuation to delimit blocks makes more sense because it makes program structure clearly distinct. Although by the same token I think I'd prefer conditionals and loops to also be symbolic operators, so that there are no keywords inside executable code, only identifiers. Basically something like "?" instead of "if", "@" instead of "while" etc.