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CSS CSS Layout Techniques Float Layout Floating Columns and Images

Elena Paraschiv
Elena Paraschiv
9,938 Points
Posted by Elena Paraschiv
Elena Paraschiv
9,938 Points

why did Gill float the .col:last-child{ float: right; }

i notice in my browser that even if I add this 

.col:last-child{
  float: right;
}

it leads to the same results as adding only this:

.col {
    padding: 30px;
  float: left; /*you need to give a width to columns to float 'em*/
  width: 30%;
}

Can someone please clarify why did Gill add float:right to the last column?

2 Answers

Jeff Lemay
Jeff Lemay
14,268 Points
Jeff Lemay
Jeff Lemay
14,268 Points

I would assume it has something to do with how browsers handle percentages.

If each column is supposed to be one-third of the width and your width is 1000px, each column should be 333.3px but we can't use partial pixels. So in this case, you might be left with an extra pixel because each column goes 333px (333x3=999). By floating the last column to the right, you ensure that your row of columns will appear to fill the full width.

Elena Paraschiv
Elena Paraschiv
9,938 Points
Elena Paraschiv
Elena Paraschiv
9,938 Points

That makes sense. Thanks Jeff :)