JSFiddle - React, Tailwind, and code Playground

by sendil J

HTML

<div id='sen'>

</div>

JavaScript

function add(a){
	if(a==1){
  	return a;
  }else{
  	return a + add(a-1);
  }
  return a;
}

var ans = add(3); 

document.getElementById('sen').innerHTML = ans;