I wanted get unique “class” from when i click button something like this

<button class="0"> 0 </button>
<button class="1"> 1 </button>
<button class="2"> 2 </button>
<button class="3"> 3 </button>

and i did it something like this

$('button').Click(function (){

var Id=$(this).attr('class');

console.log(Id);

});