When I sync my iPhone with my Windows PC using iTunes, does the sync go from iPhone to PC or from PC to iPhone?

PC to iPhone.

hlmthree wrote:

Thanks for the quick reply! So if I have more songs on my iPhone than on my PC, I would lose them with sync? If so, how do I get the extra songs that are on my iPhone to my PC?

See Recover your iTunes library from your iPod or iOS device - Apple Community.

tt2

On your PC go to the source where they came from eg if they were purchased from the iTunes Store go there and download them.