iam assigning the value of a[10]is 20 but the output is ArrayIndexOutOfBoundsException

Question

class Main
{
    public static void main(String[] args)
    {
        int a[]=new int[10];
      /*  try {
        a[10]=20;    
        }
        catch(ArrayIndexOutOfBoundsException e)
        {
  
 
        
            System.out.println("index is wrong");
        }*/
        a[10]=20;System.out.println(a[10]);
        }
    }

Answer 1

in this array the max index is 9 as we know that initialization starts from 0 so
0 1 2 3 4 5 6 7 8 9 ==>  the array size is 10 and there is no index 10 so comes the error