can i give my portal 2 pc code for one of my friends who doesnt have it?

Answer 1

If you're asking about the Steam code that comes with the PS3 version, no, it must be attached to your own Steam account.

 

The process is detailed here: http://www.joystiq.com/2011/04/19/portal-2-on-ps3-how-to-redeem-the-free-steam-copy-for-your-pc/