// Here are some sources to look at
	1. https://dev.to/samssjubair/10-javascript-interview-questions-you-should-know-2hc0
	2. https://dev.to/angelomiranda/top-10-javascript-interview-questions-and-answers-you-should-know-junior-and-senior-3943
	3. https://www.edureka.co/blog/interview-questions/javascript-interview-questions/
	4. https://www.toptal.com/javascript/interview-questions
	5. https://www.upwork.com/i/interview-questions/javascript/
	6. https://www.guru99.com/javascript-interview-questions-answers.html
	7. https://everyday.codes/javascript/10-javascript-interview-questions-for-2020/
	8. https://www.educba.com/javascript-interview-questions/
	9. https://www.interviewbit.com/javascript-interview-questions/
   10. https://morioh.com/p/4ebff6b2d5f3

function sum() {
  var i, l, result = 0;
  for (i = 0, l = arguments.length; i < l; i++) {
    result += arguments[i];
  }
  return result;
}
sum(1,2,3); // 6