Regular expressions are all about matching the user’s input to the application requirements. Although the system could accept any data without regular expressions, it will not push through since it will never be authenticated. With smart usage of regular expressions, developers should be able build a highly interactive application that screens the data. One of the key functions of regular expressions is pattern matching. As the name indicates, it’s a system within the application that determines if the input is according to the set pattern. When the pattern matching capabilities of a regular expression is set, then the data could flow through the function. Patt