Which language to learn: Objective C or Swift for iOS and OS X development?

Question

Objective-C

Hello.
I want to ask practicing developers of programs / applications for iOS and OS X.
Is it worth learning the old Objective C programming language at the start or is it better to start learning the new Swift programming language right away?
After all, according to Apple: Swift was created to replace Objective C.
I understand that in the future you will need to know both, since the old software cut is written in Objective C.

Answer 1

Swift has been running since iOS 7 and OS X 10.9.
If there is no goal to develop programs that run on older systems, then you can immediately start with Swift.
If legacy compatibility is important, then ObjC.

Answer 2

I decided for myself that I will master the development with the help of Swift-a, because I don’t want to mess with obj-c, I don’t support versions <7.0, I’m not going to get a job in any office.
If you set yourself the goal of "Get a job", then there can be no question of any Swift-e - as a June you will have to maintain and fix bugs in applications written in obj-c.

Answer 3

Objective C is old!? Cool said. Start with any, when you master one to an acceptable level, it will be easier to move on to any other. Usually people who ask such questions do not learn any language after a week. No offense, but if you were interested, you would have already tried both, or at least googled on this topic.