Get-MrLeapYear.ps1
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function Get-MrLeapYear { <# .SYNOPSIS Get-MrLeapYear is used to determine whether or not a specific year is a leap year. .DESCRIPTION Get-LeapYear is a function that is used to determine whether or not the specified year(s) are leap years. Contrary to popular belief, leap year does not occur every four years. According to Wikipedia, if a year is divisible by 400 then it's a leap year, else if the year is divisible by 100 then it's a normal year, else if the year is divisible by 4 then it's a leap year, else it's a normal year. Source: http://en.wikipedia.org/wiki/Leap_year .PARAMETER Year The year(s) specified in integer form that you would like to determine whether or not they are a leap year. The default is the current year. .EXAMPLE Get-MrLeapYear .EXAMPLE Get-MrLeapYear -Year 2010, 2011, 2012, 2013, 2014, 2015 .EXAMPLE 1890..1910 | Get-MrLeapYear .INPUTS Integer .OUTPUTS String .NOTES Author: Mike F Robbins Website: http://mikefrobbins.com Twitter: @mikefrobbins #> [CmdletBinding()] param ( [Parameter(ValueFromPipeline=$true)] [ValidateRange(1582,9999)] [int[]]$Year = (Get-Date).Year ) PROCESS { foreach ($y in $Year) { if ($y / 400 -is [int]) { Write-Output "$y is a leap year" } elseif ($y / 100 -is [int]) { Write-Output "$y is not a leap year" } elseif ($y / 4 -is [int]) { Write-Output "$y is a leap year" } else { Write-Output "$y is not a leap year" } } } } |