Toán tử logic (Logical Operators) trong Swift

let age = 25
let hasLicense = true
 
if age >= 18 && hasLicense {
    print("Can drive")
}

let isWeekend = true
let isHoliday = false
 
if isWeekend || isHoliday {
    print("Day off!")
}

let isRaining = false
 
if !isRaining {
    print("Go outside")
}

let age = 25
let hasLicense = true
let hasInsurance = false
 
if age >= 18 && hasLicense && !hasInsurance {
    print("Need insurance")
}

let result1 = false && expensiveCheck()  // Không gọi expensiveCheck()
let result2 = true || expensiveCheck()   // Không gọi expensiveCheck()