Yes, you do. Knitting in the round is a technique that is used to create circular items, such as socks, mittens, hats, and scarves. The first step in knitting in the round is to cast on. This is done by casting on stitches onto a circular needle. The next step is to knit the stitches off the needle. This is done by knitting the stitches off the needle and then placing the stitches onto a second circular needle. The circular needle is then removed from the first needle and the process is repeated. This is done in order to create a seamless circle.