What is difference between alert command and document.write command in JavaScript?

Answer 1

An alert() displays the content in a pop up dialog box while document.write() displays the content in the actual web page.

Answer 2

Alert is like a pop up message in your browser window. Document.write writes it onto the document.. which is your browser window. The DOM. Document Object Model. And I know you didn't ask but console.log() is to log the information into the debuggers console that you use.