Script Library: leapyear.r

Script Library: 1247 scripts

leapyear.r

REBOL [
    Title: "Leapyear"
    Date: 3-Jul-2002
    Name: 'Leapyear
    Version: 1.0.0
    File: %leapyear.r
    Author: "Andrew Martin"
    Purpose: "Returns true for a leap year."
    eMail: %Al--Bri--xtra--co--nz
    Web: http://valley.150m.com
    library: [
        level: 'beginner 
        platform: none 
        type: 'tool 
        domain: 'math 
        tested-under: none 
        support: none 
        license: none 
        see-also: none
    ]
]

Leapyear?: function [
    "Returns true for a leap year."
    Date [date!]    "The date to check."
    ] [Year] [
    Year: Date/year
    any [
        all [
            0 = remainder Year 4
            0 <> remainder Year 100
            ]
        0 = remainder Year 400
        ]
    ]

Notes

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(Al:Bri:xtra:co:nz)