Rename a file in Swift

rename.swift

// Create a FileManager instance
let fileManager = NSFileManager.defaultManager()

// Rename 'hello.swift' as 'goodbye.swift'
do {
    try fileManager.moveItemAtPath("hello.swift", toPath: "goodbye.swift")
} catch let error as NSError {
    print("Ooops! Something went wrong: \(error)")
}