RichardM

Oh........ Yes.....

So obvious now..

Thanks very much..

Something else learned.

Regards

Richard

Hello

I am new to this forum but have been reading on W3School for some time now. Very impressive resource indeed.

I am keen to overhaul a couple of websites that I have some responsibility for and so am very interested in becoming competent in the various responsive frameworks. I think W3 CSS is just brilliant, has a really well thought out feel to it.

However, I am stumped by a couple of numbers in one example .. http://www.w3schools.com/w3css/tryit.asp?filename=tryw3css_ref_responsive_grid..

The two reference that puzzle me are .. <div class="w3-col w3-container m4 l3 w3-yellow"> and <div class="w3-col w3-container m8 l9">..

I can not work out what the values 13 and 19 represent.. I thought it was padding, going by other examples but changing the values appears to do nothing.

What do these value represent??

Thanks

Richard