[Day 5] 조건문 : if, switch, and the ternary operator

 

 

 

1️⃣ if

if someCondition {
    print("Do something")
} else if someCondition {
    print("Do something")
} else {
    print("Do something")
}

 

 

2️⃣ switch

enum Weather {
    case sun, rain, wind, snow, unknown
}

let forecast = Weather.sun

switch forecast {
case .sun:
    print("It should be a nice day.")
case .rain:
    print("Pack an umbrella.")
case .wind:
    print("Wear something warm")
case .snow:
    print("School is cancelled.")
case .unknown:
    print("Our forecast generator is broken!")
}

 

 

 

 

 

3️⃣ ternary conditional operator  ( 삼항조건연산자 )

let hour = 23
print(hour < 12 ? "It's before noon" : "It's after noon")
// Some condition ? True : False