How to get my music from my iPhone 4s to my iPhone 6?

How do I get my music from my iPhone 4s to my iPhone 6?

You can backup everything on iCloud or iTunes from the iPhone 4S and then Restore the iPhone 6 from the backup or iCloud.

ICloud or plug your iPhone 4s into your computer and sync it and then unplug it then plug your iPhone 6 in and sync it using the same sync from your iPhone 4s

I don't understand why each of thousands of iPod and iPhone owners need to ask this question separately.