Hi I hope someone can help. I've looked at a couple of Youtube videos but can't seem to find an answer to this very basic question. When using a circular needle do you just keep knitting? ie no purl rows. I have used circular needles before to do the necks on jumpers but as that is always a rib, I have never really thought about it. I am trying to knit a scarf that is knitted as a tube so there is no front and wrong side. TIA.