Name: Swift
Creator(s): Chris Lattner, Doug Gregor, Joe Groff, Ted Kremenek and John McCall
Date: June 2, 2014
Website: swift.org
Swift is a general-purpose, multi-paradigm, compiled programming language developed by Apple Inc. and the open-source community. First released in 2014, Swift was developed as a replacement for Apple's earlier programming language Objective-C, as Objective-C had been largely unchanged since the early 1980s and lacked modern language features. Swift works with Apple's Cocoa and Cocoa Touch frameworks, and a key aspect of Swift's design was the ability to interoperate with the huge body of existing Objective-C code developed for Apple products over the previous decades.
Initially a proprietary language, version 2.2 was made open-source software under the Apache License 2.0 on December 3, 2015, for Apple's platforms and Linux. In the first quarter of 2018 Swift surpassed Objective-C in measured popularity.
Variables in Swift are declared with the keyword var, see the example below.
var name = "Jacob"
var num = 42
print(name)
print(num)If/Else statements in Swift are much the same as other language with brackets around the condition and curly braces around the body.
if num > 42 {
print("The num is greater than 42.")
} else if num < 42 {
print("The num is less than 42.")
} else {
print("The num is 42!")
}Swift provides a variety of loop types, a simple for loop is shown below.
var letters:[String] = ["a", "b", "c", "d", "e", "f", "g"]
for letter in letters {
print(letter)
}Functions in Swift are declared with the keyword func, see the example below.
func multi(no1:Int, no2:Int) -> Int {
return no1 * no2
}
print(multi(no1: 2, no2: 20))
print(multi(no1: 3, no2: 15))
print(multi(no1: 4, no2: 30))Classes in Swift are declared with the keyword class, see the example below.
class MarksStruct {
var mark:Int
init(mark: Int) {
self.mark = mark
}
}
class studentMarks {
var mark1 = 300
var mark2 = 400
var mark3 = 900
}
let marks = studentMarks()
print("Mark1 is \(marks.mark1)")
print("Mark2 is \(marks.mark2)")
print("Mark3 is \(marks.mark3)")- Awesome Swift ~ A collaborative list of awesome Swift libraries and resources.