Dynamicdeezign, documentation of html and css
The guide to create your Web site on Internet

<br> forced line break
there's not en tag on <br>
-) clear : values can be all , left or right
For visual user agents, the clear attribute can be used to determine whether markup following the BR element flows around images and other objects floated to the left or right margin, or whether it starts after the bottom of such objects. Further details are given in the section on alignment and floating objects. Authors are advised to use style sheets to control text flow around floating images and other objects.
the text <br>
the text <br clear=all>
the text <br clear=left>
the text <br clear=right>

For complete reference see html reference at W3C
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