one of my keyboard keys on the laptop just came out lol how can i fix it iz there a way?
How well depends on the brand, but most pop back in like a lens that comes out of a pair of sunglasses. And many computer repair shops have supplies of extra keys, from keyboards they replaced. Lastly, if you have to replace the keyboard itself, they're about $50, and quite EZ to install.
You unscrew the old one, pull out the flat cable, slide that part of the new one in the same place, snap the keyboard into place, and reinsert the screws (if you can; if not the speaker array, etc. will keep it in place). Of course if its under warranty, an authorized repair facility will be thrilled to bill the manufacturer an hour's labor for about 3 minutes work).