Leap year: Difference between revisions

=={{header|Koka}}==

Chain of boolean expressions

<syntaxhighlight lang="koka">

pub fun is-leap-year(year: int)

year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)</syntaxhighlight>

If-Then-Else

<syntaxhighlight lang="koka">

pub fun is-leap-year'(year: int)

year % (if year % 100 == 0 then 400 else 4) == 0</syntaxhighlight>

This approach use the buit-in libraries to create the february 28th date and the adds a day to it, which if it's in a leap year the next day wil be the 29th.

<syntaxhighlight lang="koka"> import std/time

import std/time/date

import std/time/time

pub fun is-leap-year''(year: int)

Date(year, 2, 28).time.add-days(1).day == 29</syntaxhighlight>