Built-in method

Leap
Leap in Kotlin 
import java.time.*

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

This may be considered a "wicked cheat" for this exercise, by simply passing the year into the isLeap() method of the Year class. Although it is not in the spirit of this exercise, isLeap() would be the idiomatic way to determine if a year is a leap year in the "real world".

8th May 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).plusDays(1).dayOfMonth == 29
}
plusDays method

Use the plusDays method.