"Regular expressions can be scary...really scary. Fortunately, once you memorize what each symbol represents, the fear quickly subsides. If you fit the title of this article, there's much to learn! Let's get started. "
Here we are going to design a regular expression pattern to validate email address which will check to make sure an e-mail address is a valid address, and in proper format means containing an username, at sign (@), and valid hostname.
Regular expressions are commonly known as a regex. These are nothing more than a pattern or a sequence of characters, which describe a special search pattern as a text string.