This is a regular expression (regex) tutorial to demonstrate basic definitions of commonly used parameters in programming. These expressions are powerful and flexible tools to either find or find-and-replace search patterns in strings.
Regex uses the following program to match a given URL:
/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/
Using this line, we are able to determine the validity of the entered website address. This enables the programmer to validate URLs in practically any app or program that they need.