HTML and CSS can be written in simple text editors, like Notepad, or they can use software like Adobe Dreamweaver to get some assistance with the pages you are creating.
HTML na CSS nwere ike ide ederede ederede dị mfe, dị ka Notepad, ma ọ bụ ha nwere ike iji software dị ka Adobe Dreamweaver iji nweta enyemaka na ibe ị na-eke.