Casting off is the way to finish a project. It is done quite simply- you knit two stitches, then bring the first stitch up the needle and over the second. You then knit a third stitch, and repeat....
It depends on how many stitches you have to cast off. Check your pattern as to how many stitches to cast off. Once you know, knit two stitches, and then take the stitch farthest from the end of your...
When you reach the end of your project, you must do a cast off row or the yarn will unravel. Here is a link with several different cast off techniques: http://www.knittinghelp.com/videos/casting-off