Shorten code with FOR loop

 So yeah, I want some code shorten with a for loop.
 
 
 I've tried to use this:
 
     for(int i = 2; health >= healthToSprite && health <= healthToSprite * i; i++ )
         {
             toDraw++;
 
         }
 
         print(toDraw);
 
 
 but the variable " toDraw" never change from 0.
 
 
 
 
 [CODE TO SHORTEN]
 
 void Update () 
     {
         if(health >= healthToSprite && health <= (healthToSprite * 2))
         {
             toDraw = 1;
         }
         if(health >= (healthToSprite * 2) && health <= (healthToSprite * 3))
         {
             toDraw = 2;
         }
         if(health >= (healthToSprite * 3) && health <= (healthToSprite * 4))
         {
             toDraw = 3;
         }
         if(health >= (healthToSprite * 4) && health <= (healthToSprite * 5))
         {
             toDraw = 4;
         }
         if(health >= (healthToSprite * 5) && health <= (healthToSprite * 6))
         {
             toDraw = 5;
         }
         if(health >= (healthToSprite * 6) && health <= (healthToSprite * 7))
         {
             toDraw = 6;
         }
         if(health >= (healthToSprite * 7) && health <= (healthToSprite * 8))
         {
             toDraw = 7;
         }
         if(health >= (healthToSprite * 8) && health <= (healthToSprite * 9 ))
         {
             toDraw = 8;
         }
 
 
 
         print (toDraw);
 
     }

• Jylle