plusDays method

Leap
Leap in Kotlin 
import java.time.*

data class Year(val year: Int) {
    val isLeap = LocalDate.of(year, Month.FEBRUARY, 28).plusDays(1).dayOfMonth == 29
}

This approach may be considered a "cheat" for this exercise. By adding a day to February 28th for the year, you can see if the new day is the 29th or the 1st. If it is the 29th, then the year is a leap year. This is done by using the plusDays() and getDayOfMonth() methods of the LocalDate class.

23rd Oct 2024 · Found it useful?

Other Approaches to Leap in Kotlin

Other ways our community solved this exercise
data class Year(val year: Int) {
    val isLeap = year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)
}
Boolean chain

Use a chain of boolean expressions. 

data class Year(val year: Int) {
    val isLeap = if (year % 100 == 0) year % 400 == 0 else year % 4 == 0
}
Ternary expression

Use a ternary expression. 

import java.time.*

data class Year(val year: Int) {
    val isLeap = LocalDate.of(year, Month.FEBRUARY, 28).isLeapYear
}
Built-in method

Use the built-in method.