History of Swift Programming Language
Swift was introduced in 2014 at Apples's Worldwide Developers Confrence.
The development of Swift was started in 2010 by Chris Lattner with other programmers i.e. Doug Gregor, John McCall, Ted Kremenek, and Joe Groff at Apple. The basic idea of Swift was taken from Objective-C, Rust, Haskell, Ruby, Python, C#, CLU, and many other programming languages.
Swift first version was 1.0 which undergone a major upgrade to Swift 2 at WWDC 2015. Its upgraded version 2.2 was made open-source software under the Apache License 2.0 on December 3, 2015, for Apple's platforms and Linux.
Its third version, Swift 3.0 went through a significant evolution where its syntax was changed. Swift overcame the popularity of Objective C in the first quarter of 2018.
Swift gone through several changes in Swift 4.0 version where you can update the code written with previous versions of Swift using the migration functionality built into Xcode.
Swift Version History