Will i lose all my music when i sync iphone to new lap top?

A couple months ago my itunes on my PC freaked out and i never synced my iphone to it again because i didn't want to risk losing my music. Now i have a macbook and want to put my music that is on my iphone onto the itunes on the macbook. How do i do this?

Only if your logged on to your account to itunes. Then reattached the ipod make sure your signed in and it will sync make sure its the same songs that are attached to your itunes library.

Its easy. You just hook your iPhone onto the mac with a charge, it will automatically open up iTunes, and then it will start streaming your music from your iPhone onto your mac. Easy.