Clear:where?

[Grand_master]

Quick question. Is it essential to add a property value of clear:both to an element that comes after another element, whose width is 100% and may be floated?Like here, where would a clear be needed, and why would it bee needed if the 100% width prevents anything from floating alongside it?

#navigation {width:100%; float:left... plus other things to make a horizontal bar}#content {width:100%; float:left...plus other things that require this to be floated}#footer {text-align:right}

Thanks, guys.

[S@m]

I would use the clear if you wanted to make sure your header/nav were stacking on top of one another (vertically). Otherwise, I don't see why you would need to clear them right now...