Selenium Webdriver is an open-source collection of APIs which is used for testing web applications. The Selenium Webdriver tool is used for automating web application testing to verify that it works as expected or not. It mainly supports browsers like Firefox, Chrome, Safari and Internet Explorer. It also permits you to execute cross-browser testing.
WebDriver also enables you to use a programming language in creating your test scripts (not possible in Selenium IDE).
You can now use conditional operations like if-then-else or switch-case. You can also perform looping like do-while.