guard statement rules

Pick all that apply

• 1Choice 1.

  The else block must exit the current scope (return, throw, continue, break, fatalError(), and so on), or it's a compile error

• 2Choice 2.

  A value bound with guard let x = optional else { ... } stays usable in the same scope from the line after the guard

• 3Choice 3.

  guard can only be used in a function body, not inside for or while loops

• 4Choice 4.

  guard let is the reverse of if let: it goes to the else block when the optional is not nil

• 5Choice 5.

  You can chain optional bindings and Bool conditions with commas, as in guard let user = user, user.isActive, let token = user.token else { return }