Can there be any problems if I just write height=150 instead of height="150px"?

Question

or is it OK?

Answer 1

if you code like that's , it means your broking XHTML rules .

Answer 2

you should declare measurement for ease of reading code

Answer 3

fair enough, thanks!

Answer 4

xhtml is so 90s. really... ditch it lol.

but it breaks in HTML5 too