Simply having a new line in your text file will not provide a new paragraph or new line. When a browser views the HTML, it actually appends each line together before processing the file. It also removes extra spaces. Let me append this to the last statement, Not all browsers follow appropriate standards. For instance one specific browser ignores the   embedded code which means to insert a non-breaking space. The particular browser that I am speaking of actually displays this embedded code in the web page. If you see things like this in your web pages you access please don't blame those who created the web page, rather contact the vendor of your browser, or maybe even stop using that browser.

Back to starting a new paragraph. There are a few ways to start a new paragraph. There are also some formatting parameters to some of these tags as will be explained.