What does 'fileprivate' keyword means in Swift?

Question

I'm starting in swift and opening a project created using swift2 from xcode 8 beta, the private modifier were changed to fileprivate. what does this keyword means? and how is different from private ?

Solution

fileprivate is one of the new Swift 3 access modifiers that replaces private in its meaning. fileprivate defines an entity (class, extension, property, ...) as private to everybody outside the source file it is declared in, but accessible to all entities in that source file.

private restricts the entity in the direct enclosing scope.