Swift Programming Examples

Single Expression

swift

var count:[Int] = [5, 10, -6, 75, 20]
let descending = count.sorted(by: { n1, n2 in n1 > n2 })
let ascending = count.sorted(by: { n1, n2 in n1 < n2 })

print(descending)
print(ascending)

Ascending Order Example

swift

let sum = {
   (no1: Int, no2: Int) -> Int in 
   return no1 + no2 
}

let digits = sum(10, 20)
print(digits)

Ascending Order Program

swift

func ascend(s1: String, s2: String) -> Bool {
   return s1 > s2
}

let stringcmp = ascend(s1: "Swift 4", s2: "great")
print (stringcmp)

Closures Example

swift

let divide = {
   (val1: Int, val2: Int) -> Int in 
   return val1 / val2 
}

let result = divide(200, 20)
print (result)

Closures Program

swift

let studname = { print("Welcome to Swift Closures") }
studname()

Nested Functions

swift

func calcDecrement(forDecrement total: Int) -> () -> Int {
   var overallDecrement = 0
   func decrementer() -> Int {
      overallDecrement -= total
      return overallDecrement
   }
   return decrementer
}

let decrem = calcDecrement(forDecrement: 30)
print(decrem())

Using Function Types

swift

func sum(a: Int, b: Int) -> Int {
   return a + b
}
var addition: (Int, Int) -> Int = sum
print("Result: \(addition(40, 89))")

Function Types Program

swift

func inputstr() {
   print("Swift 4 Functions")
   print("Types and its Usage")
}
inputstr()

Function Types

swift

func inputs(no1: Int, no2: Int) -> Int {
   return no1/no2
}

print(inputs(no1: 20, no2: 10))
print(inputs(no1: 36, no2: 6))

Constant, Variable and I/O Parameters

swift

func temp(a1: inout Int, b1: inout Int) {
   let t = a1
   a1 = b1
   b1 = t
}

var no = 2
var co = 10
temp(a1: &no, b1: &co)
print("Swapped values are \(no), \(co)")

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