import Cocoa

//Is 2023 a leap year?
let isLeapYear = 
2023 % 4 == 0 && (2023 % 100 != 0 || 2023 % 400 == 0)

if isLeapYear {
    print("2023 is a leap year")
} else {
    print("2023 is not a leap year")
}

Output

2023 is not a leap year