Created includes.js for includes method

Author: niyonx

JavaScript_Basics/includes.js

@@ -0,0 +1,7 @@
+// Find substring in a string. Similar to contains in java.
+
+// Defining dummy variables
+var string = "foo", substring1 = "oo", substring2="a";
+
+console.log(string.includes(substring1)); // true
+console.log(string.includes(substring2)); // false