I am making a sweater. (As you can guess I am a novice.) The pattern says to ‘end with a WS row’. I am working in stockingette. Does this mean that I purl my row and then cast off? Or cast off after finishing my knit row?
Thank you!
What is 'end with a WS row'?
You would purl the row, but don’t cast off, see what the next instructions are. They’re probably to cast off only a few sts for shaping the armhole on the RS row.
My instructions say “work in st until piece measures 14.5” from cast on edge. ending with a ws row. bind off all stitches loosely. "
The sweater is a very simple drop sleeve pattern. Both the front and back have these ‘end with wrong side row’ instructions.
I just don’t want to get it wrong.
The crux of my question is: when I cast off, do I cast off in knit or in purl?
I’ve got to my required length. Do I purl the last row and then cast off in purl, or do I cast off in knit (the row previous being purl)?
Oh, okay, you’re done then. If you ask if you go ahead and do something next, it’s a good idea to put those directions in your post too - we’re pattern readers, not mind readers. 
Whenever a pattern says ‘end with a ws or rs row’ it means you finish working that row, then go on to the next instruction.
A BO/cast off row is just like another row except you’re taking stitches off the needles. If you were to do another row, you would knit it, so do a knit cast off for this one. If the row would normally be purled, then do a purl cast off.