#!/usr/bin/env node;
/******************************************************************************
 * This program computes leap years.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

/******************************************************************************
 * Returns true if a year is a leap year.
 *****************************************************************************/
function isLeapYear(Y) {
    return Y % 4 === 0 && Y % 100 !== 0 || Y % 400 === 0;
}

const main = async () => {
    console.log(["1900 is ", (isLeapYear(1900) ? "" : "NOT "), "a leap year."].join(''));
    console.log(["2000 is ", (isLeapYear(2000) ? "" : "NOT "), "a leap year."].join(''));
    console.log(["2012 is ", (isLeapYear(2012) ? "" : "NOT "), "a leap year."].join(''));
    console.log(["2019 is ", (isLeapYear(2019) ? "" : "NOT "), "a leap year."].join(''));
}
main().catch( e => { console.error(e) } );