Lisp for the C++ programmer: for loop

Here is the example of for loop. Equivalent C++ code is commented on the top the Common Lisp code as comments.

 ; for (int i = 0; i <= 10; i++){  
 ;    printf("%f\n", i);  
 ;    printf("%f\n", i * 2);  
 ; }  
   
 (loop for i from 0 to 10  
     do  
     (progn  
         (print i)  
         (print (* i 2))  
     )  
 )