var x = 3; var y = 4;
         print(add x y)

   var x = 3; var y = 4; var z = 0;
         {while (greater x 0) do
            { z = (add z y); 
              x = (sub x 1)}; 
          print z}

   var x = 3;
         {print x;
          var x = 4; 
                {print x};
          print x}

   var f = (lambda (x y) 
           (mul x y));
   var x = 3;
         print(f 4 x)