there are a variety of ways to close a round..
take your pick:
Other variations or combinations of the above –or something else completely different
[li]join… just knit last stitch then first[/li][li]before closing round, slip last stitch of needle, and first stitch off other needle. Cross them so the last become the first, and the first the last (a simple twist stitch) VVVVL|FVVVV–where | is beginning of round)[/li][li]cast on 1 extra stitch–pass last stitch of cast on onto other needle knit last stitch and first stitch together (a decrease to correct count.)[/li][li]Cast on. Use TAIL from cast on And regular yarn, knit first few stitches of round with both yarns, (be careful to treat the double yarn stitches as single ones on round 2–be sure to mark the Beginning of the round--(since the tail will have moved in a few stitches[/li][li]Use method 1, if there is a big gap when you come back to beginning of the round, twist excess yarn into a make 1, and knit it together with first stitch of round 2 (to close the gap)[/li][li]you can also, cast on 1/2 required stitches, Plus 4 more (need 100? cast on 50 +4) work 3 to 5 rows [/li]repeat(that is, cast on 1/2 + 4, work 3 to 5 rows) then join into round by over lapping 4 stitches of front with 4 stitches of back, and knit them together sort of 3 needle bind off style, (but don’t bind off!) do the same on other edge, and have a lapped placket closure on each side seam. (gurnsey style)for socks, you might want to only overlap 2 or 3)
[/ol] I tend to use method 1 for sweaters, and method 3 for socks..
You can pick the one you like best!pick the one you like best..
How should you join into round? you decide! its one of those a small persnickity details.. 1 is the plainest, the gurnsey style is most noticable. they all work.. they are all correct.. its ONLY MATTERS if you think it does!
these 7 options aren't the ONLY ones, just the most common ones.. try one or two (or try them all!) and decide which one (or ones!) is the best for you.