iOS 6 users who have upgraded (or will upgrade) to iOS 7 may lament the loss of their “swipe to delete” functionality. In iOS 6, swiping to the right brought up a 'Delete' button, whereas now in iOS 7 that to-the-right swipe causes a different type of navigation.
Never fear: Apple hasn't left you in the dark, you just need to learn the other way of doing this. Try swiping to the left in mail and you'll get instant payoff … plus a bonus! In addition to getting the instant delete function, there's also a “More” button that allows you several options including: Reply, Forward, Flag, Mark as Read/Unread, Move to Junk, and Move to any folder.
Swipe to the left (just like Beyoncé) in iOS 7's Mail to Delete … and More!