Object Iterables

for (const x of "Closetag") {
  /* code block to be executed*/
}

for (const x of [1,2,3,4,5] {
  /* code block to be executed*/
}

/* Home Made Iterable */
function myNumbers() {
  let n = 0;
  return {
    next: function() {
      n += 10;
      return {value:n, done:false};
    }
  };
}

/* Create Iterable */
const n = myNumbers();
n.next(); /* Returns 10 */
n.next(); /* Returns 20 */
n.next(); /* Returns 30 */

/* Create an Object */
myNumbers = {};

/* Make it Iterable */
myNumbers[Symbol.iterator] = function() {
  let n = 0;
  done = false;
  return {
    next() {
      n += 10;
      if (n = 100) {done = true}
      return {value:n, done:done};
    }
  };
}

let iterator = myNumbers[Symbol.iterator]();

while (true) {
  const result = iterator.next();
  if (result.done) break;
  // Any Code Here
}