๐ŸŒฟ ํ•จ์ˆ˜

Terry/์ด์€ํ•œยท2022๋…„ 4์›” 17์ผ
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๋ชฉ๋ก ๋ณด๊ธฐ
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๋ณธ ๋ธ”๋กœ๊ทธ์˜ ๋‚ด์šฉ์€ ๋ช‡๋ช‡ ํ•™์Šต ๊ธฐ๊ด€๋“ค์˜ ์ž๋ฃŒ๋ฅผ ์ฐธ๊ณ ํ•˜์—ฌ ์ €์ž ์Šค์Šค๋กœ ํ•™์Šตํ•œ ๋‚ด์šฉ์ด๊ธฐ์— ํ‹€๋ฆฐ ๋‚ด์šฉ์ด ํฌํ•จ๋˜์–ด ์žˆ์„ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์˜ค๋ฅ˜๋ฅผ ๋ฐœ๊ฒฌํ•˜์‹ค ๊ฒฝ์šฐ ๋Œ“๊ธ€์„ ๋‚จ๊ฒจ์ฃผ์‹œ๊ธฐ๋ฅผ ๋ถ€ํƒ๋“œ๋ฆฝ๋‹ˆ๋‹ค. ๐Ÿ™๐Ÿป

ํ•จ์ˆ˜ ๊ตฌ์„ฑ

       
    func ํ•จ์ˆ˜์ด๋ฆ„ (๋งค๊ฐœ๋ณ€์ˆ˜1: type, ๋งค๊ฐœ๋ณ€์ˆ˜2: type) -> ๋ฐ˜ํ™˜๊ฐ’{
		์›ํ•˜๋Š” ํ•จ์ˆ˜ ๊ธฐ๋Šฅ
        return 
    	}
    
    ํ•จ์ˆ˜์ด๋ฆ„(๋งค๊ฐœ๋ณ€์ˆ˜1, ๋งค๊ฐœ๋ณ€์ˆ˜2) 
    // return ๊ฐ’ 
   
    
  • ์ „๋‹ฌ์ธ์ž ์‚ฌ์šฉ
    
    func ํ•จ์ˆ˜์ด๋ฆ„ (์ „๋‹ฌ์ธ์ž1 ๋งค๊ฐœ๋ณ€์ˆ˜1: type, ...) -> ๋ฐ˜ํ™˜ํƒ€์ž… {
    ํ•จ์ˆ˜ ๊ธฐ๋Šฅ
    return
    }
    
    ํ•จ์ˆ˜์ด๋ฆ„(์ „๋‹ฌ์ธ์ž1: ๋งค๊ฐœ๋ณ€์ˆ˜) 
    // return
    
func greeting(to friend: String, frome me: String) {
	print("Hello \(friend)! I'm \(me)")
    }
    
greeting(to: "hana", from: "yagom")
// Hello hana! I'm yagom
  • ๊ฐ€๋ณ€๋งค๊ฐœ๋ณ€์ˆ˜: ๋งค๊ฐœ๋ณ€์ˆ˜ ๊ฐœ์ˆ˜๋ฅผ ์›ํ•˜๋Š” ๋งŒํผ ํ›„์— ์„ค์ • ๊ฐ€๋Šฅ
func sayHelloToFrinds(me: String, friends: String...) -> String {
	return "Hello \(friends)! I'm \(me)!"
    }
    
print(sayHelloToFriends(me: "yagom", friends: "hana", "eric", "wing"))
//Hello ["hana", "eric", "wing"]! I'm yagom!
  • ํŠน์ • ๋งค๊ฐœ๋ณ€์ˆ˜๋ฅผ ๊ธฐ๋ณธ๊ฐ’์œผ๋กœ ์ง€์ • ํ•  ์ˆ˜ ์žˆ์Œ.
func sayHelloToFrinds(me: Terry, friends: String...) -> String {
	return "Hello \(friends)! I'm \(me)!"
    }
    
print(sayHelloToFriends(friends: "hana", "eric", "wing"))
//Hello ["hana", "eric", "wing"]! I'm Terry!
//me: Terry๋ฅผ ๊ธฐ๋ณธ์œผ๋กœ ์ง€์ •ํ•ด์ฃผ์—ˆ๊ธฐ์—, ๋งค๊ฐœ๋ณ€์ˆ˜ friends๋งŒ ์ž…๋ ฅํ•ด๋„ ํ•จ์ˆ˜ ์‹คํ–‰๊ฐ€๋Šฅ
  • ๊ธฐ์กด ํ•จ์ˆ˜ ํ• ๋‹น
var ํ•จ์ˆ˜๋ช…: (type, type...) -> returntype = ํ• ๋‹นํ•จ์ˆ˜๋ช…(๋งค๊ฐœ๋ณ€์ˆ˜1, ๋งค๊ฐœ๋ณ€์ˆ˜2...)
    
    print(1, 2, 3) 
    1 2 3
    
    print(1, 2, 3, seperator: "!")
    1!2!3
    
    print(1, 2, 3, separator: "")
    123
    
    print("์€์€ํ•œ :")
    print("์€ํ•œ")
    ์€์€ํ•œ :
    ์€ํ•œ
    
    print("์€์€ํ•œ", terminator: ":")
    print("์€ํ•œ")
    ์€์€ํ•œ : ์€ํ•œ
  • dump ์‚ฌ์šฉ ์‹œ, print๋ณด๋‹ค ๋” ์ž์„ธํ•œ ๋‚ด์šฉ ํ™•์ธ ๊ฐ€๋Šฅ

์˜ˆ์‹œ

func isEven(num: Int) -> Bool {
    var decider = num%2
    return decider == 0
}
 isEven(num: 10) // True
    
 func calculateAgeRange(calYear: Int, birthYear: Int) -> String {
    var number = (calYear - birthYear) - (calYear - birthYear)%10
    return "\(number) ๋Œ€"
}
calculateAgeRange(calYear: 2021, birthYear: 1993) // 20 ๋Œ€    

์กฐ๊ฑด๋ฌธ

var fruitName = "์‚ฌ๊ณผ"

if fruitName == "์‚ฌ๊ณผ" {
    print("์ œ๊ฐ€ ์ข‹์•„ํ•˜๋Š” ์‚ฌ๊ณผ๋„ค์š”!")
} else if fruitName == "๋”ธ๊ธฐ" {
    print("๋”ธ๊ธฐ๋Š” ๋…ผ์‚ฐ ๋”ธ๊ธฐ")
} else if fruitName == "์ˆ˜๋ฐ•" {
    print("์—ฌ๋ฆ„์€ ์—ญ์‹œ ์ˆ˜๋ฐ•!")
} else {
    print("๋‹ค๋ฅธ ๊ณผ์ผ๋“ค๋„ ๋ง›์žˆ์ฃ !")
}


var fruitName = "์‚ฌ๊ณผ"

switch fruitName {
case "์‚ฌ๊ณผ":
    print("์ œ๊ฐ€ ์ข‹์•„ํ•˜๋Š” ์‚ฌ๊ณผ๋„ค์š”!")
case "๋”ธ๊ธฐ":
    print("๋”ธ๊ธฐ๋Š” ๋…ผ์‚ฐ ๋”ธ๊ธฐ")
case "์ˆ˜๋ฐ•":
    print("์—ฌ๋ฆ„์€ ์—ญ์‹œ ์ˆ˜๋ฐ•!")
default:
    print("๋‹ค๋ฅธ ๊ณผ์ผ๋“ค๋„ ๋ง›์žˆ์ฃ !")
}

๋ฐ˜๋ณต๋ฌธ

func printGugudan(dan: Int) {
    for time in 1...9 {
        print("\(dan) * \(time) = \(dan * time)")
    }
}

printGugudan(dan:2)

์ถœ๋ ฅ
2 * 1 = 2
2 * 2 = 4
2 * 3 = 6
2 * 4 = 8
2 * 5 = 10
2 * 6 = 12
2 * 7 = 14
2 * 8 = 16
2 * 9 = 18

var people = ["์ฒ ์ˆ˜","์˜ํฌ","๋ฏผ์ˆ˜","ํ˜•์ค€","๊ธฐ๋‚จ","๋™ํฌ"]

for person in people {
    print(person)
}

Referance
์•ผ๊ณฐ์•„์นด๋ฐ๋ฏธ ์ฝ”๋”ฉ์Šคํƒ€ํ„ฐ ๊ฐ•์˜ ์ž๋ฃŒ

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