-Json.parse takes a json string and transform it into a javascript object or
-it is used to convert text into js object.
-can also take an second argument fo ora reviver function that can transform the object values before they are returned.
-json.stringfy takes a javascript object and transforms it into a json string.
-Can also take two additional arguments, the first one being a replacer function and
-the second a string or Number value to use as a space in the returned string.