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Leap year

curriculum/challenges/english/blocks/rosetta-code-challenges/5a23c84252665b21eecc7ede.md

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--description--

Determine whether a given year is a leap year in the Gregorian calendar.

--hints--

isLeapYear should be a function.

js
assert(typeof isLeapYear == 'function');

isLeapYear() should return a boolean.

js
assert(typeof isLeapYear(2018) == 'boolean');

isLeapYear(2018) should return false.

js
assert.equal(isLeapYear(2018), false);

isLeapYear(2016) should return true.

js
assert.equal(isLeapYear(2016), true);

isLeapYear(2000) should return true.

js
assert.equal(isLeapYear(2000), true);

isLeapYear(1900) should return false.

js
assert.equal(isLeapYear(1900), false);

isLeapYear(1996) should return true.

js
assert.equal(isLeapYear(1996), true);

isLeapYear(1800) should return false.

js
assert.equal(isLeapYear(1800), false);

--seed--

--seed-contents--

js
function isLeapYear(year) {

}

--solutions--

js
function isLeapYear(year) {
  return year % 100 === 0 ? year % 400 === 0 : year % 4 === 0;
}