Boolean và Kiểu Bool trong Swift

let isSwiftFun: Bool = true
let isPythonBetter: Bool = false
 
var isValid = true
var isEmpty = false

let age = 25
let isAdult = age >= 18  // true
 
let score = 85
let isPassed = score >= 50  // true

let a = true
let b = false
 
print(a && b)   // false - AND
print(a || b)   // true  - OR
print(!a)       // false - NOT

let isWeekend = true
 
if isWeekend {
    print("Day off!")
}
 
let status = isWeekend ? "Weekend" : "Weekday"