There are functions and then, the name of the scale degrees (you know like Tonic super tonic, mediant etc) but they are two different things I should add maybe that is what they are referring to on wikipedia, like the seven degree names, but function is indeed just 3 and maybe mediants depending on who you ask
German:
Well, when you're building your own notions of this kind of thing, you want something to draw from...
There are functions and then, the name of the scale degrees (you know like Tonic super tonic, mediant etc) but they are two different things I should add maybe that is what they are referring to on wikipedia, like the seven degree names, but function is indeed just 3 and maybe mediants depending on who you ask