Overview-
- Swift, rightly named after the Swift bird (which is one of the fastest fliers) was developed to be a faster alternative to Objective-C.
- It’s a safe, fast, and interactive programming language that combines the best in modern language.
- It is a scripting language used by industries.
- It is an alternative to the Objective-C language which was the recommended and most popular language for building apps for Apple’s ecosystem of devices.
History of Swift-
Year | Version |
09-09-2019 | Swift 1.0 |
22-10-2014 | Swift 1.1 |
08-04-2015 | Swift 1.2 |
21-09-2015 | Swift 2.0 |
13-09-2016 | Swift 3.0 |
19-09-2017 | Swift 4.0 |
29-03-2018 | Swift 4.1 |
17-09-2018 | Swift 4.2 |
25-03-2019 | Swift 5.0 |
Comparisons between Objective C and Swift-
- As compared to Objective C, syntax of Swift is easy.
- In Objective-C, you have to maintain two code files for each class you write — a header file with a .h extension and an implementation file with a .m extension, while in swift only one is maintained.
- As of now, there is a compiler for swift for Linux. This is a huge step-up from Objective-C which could only be used on a Mac OS machine.
- Statements do not need to end with semicolons (
;), though these must be used to allow more than one statement on a line. - Generic Programming.
- Functions are first class objects.
- Enumeration cases can have associated data
- Swift 2.0 introduces a different and incompatible error-handling model.
Features of Swift-
- Memory management is automated.
- Integers are checked for overflow.
- Variables are always initialized before use.
- Optional ensure that nil values are handled explicitly.
- Error handling allows controlled recovery from unexpected failures.
Thanks
Team BYJU'S Exam Prep!
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