diff --git a/lib/is-iterable.js b/lib/is-iterable.js
index 9505300..f747e9d 100644
--- a/lib/is-iterable.js
+++ b/lib/is-iterable.js
@@ -6,8 +6,8 @@
  * @example
  * const isIterable = require('ho-iter').isIterable;
  *
- * console.log(isIterable([1, 2, 3])); // true
- * console.log(isIterable(123)); // false
+ * isIterable([1, 2, 3]); // true
+ * isIterable(123); // false
  *
  * @param  {*} iterable - a value which might implement the Iterable protocol.
  * @return {boolean}
diff --git a/lib/is-iterator.js b/lib/is-iterator.js
index bb866ab..c3fc3b3 100644
--- a/lib/is-iterator.js
+++ b/lib/is-iterator.js
@@ -1,9 +1,18 @@
 'use strict';
 
 /**
- * Checks if `obj` is iterator.
+ * Returns `true` if the specified object is iterator.
  *
- * @param  {*} obj - some object.
+ * @example
+ * const isIterator = require('ho-iter').isIterator;
+ *
+ * const generator = function *() {};
+ * const iterator = generator();
+ *
+ * isIterator(generator) // false
+ * isIterator(iterator) // true
+ *
+ * @param  {*} iterator - a value which might implement the Iterable protocol.
  * @return {boolean}
  */
-module.exports = (obj) => Boolean(obj) && typeof obj.next === 'function';
+module.exports = (iterator) => Boolean(iterator) && typeof iterator.next === 'function';