명령줄에서 전환 실행 (참고)

기본 설정

$ sudo xcode-select -s /Applications/Xcode.app
$ sudo xcode-select --install

xcode-select: note: install requested for command line developer tools

$ swift

Welcome to Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15).
Type :help for assistance.
  1>  

번역하다

var n = 100
repeat {
    print("\(n)")
    if n % 2 == 0{
    n /= 2
    }else{
    n = n * 3 + 1
    }
}while n > 1
print(n)

$ swiftc collatz.swift

$ ./collatz

100
50
25
76
38
19
58
29
88
44
22
11
34
17
52
26
13
40
20
10
5
16
8
4
2
1

해석 실행

swift collatz.swift

참고 문헌