How to make if limit is reached then make sliders only slide back in ui (not forward)

I found solution with myself I added + ve - symbols and I blocked slider controls from user in the red area is all available points and if it's reaches the 10 in the blue area slider reaches the max limit (default limit is 10) and player can only reduces the value

  public void special()
     {
 
         stlefttxt.text = strength.value.ToString()+" Points";
         prlefttxt.text = perception.value.ToString() + " Points";
         endulefttxt.text = endurance.value.ToString() + " Points";
         chrslefttxt.text = charisma.value.ToString() + " Points";
         intellefttxt.text = intelligence.value.ToString() + " Points";
         agilefttxt.text = agility.value.ToString() + " Points";
         lcklefttxt.text= luck.value.ToString() + " Points";
         var a = points.value = strength.value+perception.value+endurance.value+intelligence.value+agility.value+luck.value+charisma.value;
         
         if (points.value==10)
         {
             
             errorfeedback.text = "limit";
             strength.maxValue = strength.value;
             perception.maxValue = perception.value;
             endurance.maxValue = endurance.value;
             charisma.maxValue = charisma.value;
             intelligence.maxValue = intelligence.value;
             agility.maxValue = agility.value;
             luck.maxValue = luck.value;
 
 
         }
         else
         {
             strength.maxValue = 10;
             perception.maxValue = 10;
             endurance.maxValue = 10;
             charisma.maxValue = 10;
             intelligence.maxValue= 10;
             agility.maxValue = 10;
             luck.maxValue = 10;
 
         }
        
         pointslefttxt.text=a + " Points";
         
     }